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Daniel John Kollias

Divorce and separation Attorney at Winfield, IL

4.8   30 reviews

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About Daniel

Learn Daniel’s areas of practice.

Practice areas
  1. Divorce and separation
    Contested and uncontested divorces, self-employed and high-asset clients, prenuptial agreements, maintenance (including modification and termination of maintenance)

    24 years

  2. Child custody
    Joint, sole, or shared custody, including custody modifications.

    24 years

  3. Child support
    Including modification and enforcement of prior orders, arrearages, college expense cases.

    24 years

  4. Corporate and incorporation
    Form corporations, LLC's, draft shareholder and operating agreements, buy / sell agreements

    24 years

  5. Family
    Visitation cases, including modification and enforcement of prior orders, guardianship, paternity cases, and appeals of domestic relations cases.

    24 years

Daniel J. Kollias received his law degree from Notre Dame Law School 1999.  He is also a e of the University of Michigan, where he earned a B.A. in Economics. During law school, Dan worked as a law clerk for the Cook County State’s Attorney’s Office at 26th and California in Chicago.


After graduating law school, Dan worked as an Assistant State’s Attorney in the Cook County State’s Attorney’s Office, where he prosecuted criminal appeals and juvenile abuse and neglect cases.  After leaving the State’s Attorney’s Office, Dan successfully owned and managed a restaurant and bar in Elmhurst.  Dan sold the business in 2002, and returned full-time to the practice of law.


Dan has represented clients in many areas of the law, but primarily focuses his practice on family law.  He handles divorce, legal separation, paternity, child custody, visitation, and child support cases.  Dan also has extensive experience in appellate work, having prevailed in 29 criminal and civil cases on appeal. 


            Dan is an active member of the Du Page County Bar Association, and has given presentations on topis of child custody evaluations and challenges to paternity.  He is certified as a guardian ad litem in DuPage County.  Dan speaks Greek fluently.

Photos and videos

Licensed for 23 years
State IL
Status Active and Authorized to Practice Law
Acquired 1999
Updated 01/06/2023

We have not found any instances of professional misconduct for this lawyer.

Contact Daniel

Similar lawyers nearby

Kollias, PC
1N141 County Farm Road
Suite 200
Winfield, IL, 60190
Kollias, PC
1N141 County Farm Road
Suite 200
Winfield, IL, 60190
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4.8 / 5.0
  30 customer reviews
Posted by anonymous | January 6, 2019
This review is from a person who hired this attorney.
| Hired Attorney
Simply, the best.
I hired Dan on a very highly litigated case with my daughter. Letting him go was very difficult for me - and I regret it till this day. I have had many attorneys (as my case is on-going) and nobody compares to how Dan was extremely dedicated to my case. Dan is highly well known, respectable, in DuPage Courts. I have only said positive things about him in what he has done for my case. He was very truthful and communicative. He did his very best to try and protect my daughter. He remembered dates, incidents, evidence, retold my case perfect - even during my arbitration hearing. If I could rehire him, I would in a heart beat. I know he would have never let my case get out of hand. I recommend him if you want someone who will try every strategy to protect you and your child in your case.
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Posted by anonymous | May 14, 2017
This review is from a potential client who consulted with this attorney.
| Consulted Attorney
Very good lawyer!
Very good lawyer!
Posted by Kathleen | February 16, 2017
This review is from a person who hired this attorney.
| Hired Attorney
Your attorney is everything in a divorce, hire Dan
Learn from my mistakes. I was married for 19 years, while I focused on being a good mom, my xhusbands focus was alcohol. Finally I had enough..I didn't have much money becuz my x was sneaky and thoughtless. Money was gone, hidden who knows...but I took the little I had s hired an attorney. She didn't really know the revised divorce laws and my x hired a very experienced attorney from the city. So after s year of basically fees with no results, she handed me off to her sister, this is where it gets interesting. After dealing with her sister and having her sister represent me in a pre-trial I began to have some doubts. I googled her, to my shock and horror she was practicing with a suspended license. I fired her immediately and found another attorney who happily took my money. He really did nothing to move things along, argued with me trying to accept a deal that was not equitable on my behalf. One day I called my x to confirm something and my x casually mentions that he spoke to my attorney over the phone. Again, horrfied and confused snd eight weeks from trial I had to find someone else. It was not an issue if money anymore, I needed someone dedicated, organized and determined. I interviewed Dan Kollias and knew he was the one. Dan had a huge mess to clean up and filter throught almost two years of paperwork. He came in on weekends, responded to every email, every call, kept me apprised as to what was going on. The piece of mind was priceless. I knew he would get the job done and he did. It's finally over, after almost two years and lots of bs I am happily divorced and happy with my settlement. Don't cheap out on your attorney, you need someone sharp, dedicated, result orientated, familiar with the new laws, not intimidated by other counsel and most importsnt ... is on your side! Hire Dan Kollias Thanks Dan
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Posted by Nick | August 29, 2016
This review is from a person who hired this attorney.
| Hired Attorney
Custody and support.
Dan is an excellent attorney. He let me know everything he could do for my case and made sure he was always a step ahead. He was very honest and always kept me in the loop of what was going on in my case. As a father in DuPage county he helped me get the primary residential custody of my son and recieve child support. He is very knowledgeable of the law. When the time came he had no problem fighting for me.
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Posted by anonymous | January 6, 2016
This review is from a person who hired this attorney.
| Hired Attorney
Great attorney! Very orginaized! Very detailed! Caring & Honest a RARE find!
Let me start off by saying, I dont have a lot of money. I did not flinch when i got my final bill, due to the professional manner that Daniel handled my case. My case was a long case and had a lot of ups and downs. He held my hand the whole way thru. He responded to everything fast! There are emotional times in divorce, where you want to blow up on your attorney, Daniel took it all. He understands when there are children involved emotions run hot! He always put my mind at ease and explained everything. At first I was really upset with never getting good news. Then I figured out lawyers are like doctors. When they tell you that you have 3 months to live, then you never die you are happy! Well that was my case... I was always dying, but then I felt alive as I walked out of the court room! I can also say this. As I went through a couple trials, I clearly saw how prepared Daniel was! He had everything prepared, typed out, a copy for me, and everything bullet pointed. At first I thought nothing of it until I saw my exs attorney fumbling thru books and paperwork in the process of the trials. Also as i watched other trials to mentally prepare for my own, I later appreciated Daniels attention to detail. Bottom line is, I would highly recommend Daniel!
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Posted by Ken | March 6, 2015
Very pleased.
I found Dan Kollias during an internet search for a divorce lawyer. He and his staff were very professional and thorough during my divorce process. Dan is very knowledgeable of divorce law and always made sure I understood the reality of the law and how it would effect me. I liked the fact that Dan, with his years of experience, would tell me what was possible and what was not possible regarding my case and that really impressed me. Dan was very proactive when preparing my case. He asked for information that felt would help my case. To me, that demonstrated his knowledge and experience from his years of representing clients. From a financial viewpoint, I never felt that Dan overcharged me or provided any services that were not warranted. Dan also has an excellent staff working for him. I could call anytime during business hours and speak with his assistant who was professional and friendly and made sure my questions were answered or forwarded to Dan. If I did have a question that only Dan could answer, he would get back to me with an answer within 24 hours or as soon as he could get the answer. I highly recommend Dan Kollias if you are in need of a divorce lawyer.
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Posted by anonymous | September 29, 2014
Child Support Help
Dan did a wonderful job representing and ultimately winning my case. He was very professional, compassionate and a great communicator. I have struggled for years with my ex changing amount of child support, paying what he felt like or not paying at all. Dan stepped in during a very difficult time and helped me define more precise requirements we would ask the court to hold my ex to. They ended up settling out of court with us because our case was so strong. A big and important victory for my family. I would definitely recommend Dan to anyone needing a divorce or family law attorney and will use him again in the future if needed.
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Posted by anonymous | April 8, 2014
Great business lawyer!
Dan is smart and was very creative in crafting solutions to my legal problem, which centered around my business and my planning for my children to take over the business in the future. He was very patient with me. He always answered my questions. He was very good in explaining the ins and outs of what he was going to do for me. And he always followed through. I would recommend him to anyone needing a thorough, conscientious, and honest lawyer.
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Posted by Lucas | December 12, 2013
Professional Family Lawyer
Dan is very professional and concise in his work ethic. I have had Dan as my attorney for just under a year and I have been completely satisfied with the results he’s provided. He is professional in manner, provided the best logical advice, and has fulfilled everything each and every recommendation. Dan has provided legal counsel in the regard what was in the best interest for myself and my situation. I have heard a few stories which cases weren’t settled promptly. Lastly Dan holds a compassion for his role, in the regard that he provided the defense I needed for my situation. He didn’t offer any outrageous promise and not fulfill. I really could tell he was going to bat for me during my case. I am completely satisfied with the way Dan handled my case and would recommend Dan to anyone that I know in need of a family attorney.
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Posted by Brian | June 10, 2013
Highly Recommended Divorce Laywer
I hired Dan Kollias after my previous lawyer was unable to move my divorce along in an efficient, beneficial manner. Before retaining him, I explained the situation and what I expected. Dan clearly spelled out to me his intended next steps, and how he would approach the situation. After retaining him, Dan immediately followed through on those steps as promised. He did a great job of filtering out the non-important issues and kept his actions working towards finalizing the divorce and obtaining the terms that were in my best interest. As a father being threatened with loss of custody and basic parenting rights, Dan gave me the confidence to stand firm on the things I needed without the worry of losing those rights. Dan was consistently very responsive with both phone calls and emails. He did a great job of summarizing to me where everything stood at every phase of the process. Dan is very knowledgable, and made it a priority to make sure I understood things clearly. I would absolutely recommend him as a divorce lawyer.
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Posted by Jennifer | January 27, 2013
Daniel J. Kollias is a great asset to our community!
Mr. Kollias was very helpful with my case. He genuinely cared about my children and their well being. He fought for what was right for my children. I felt safe through the whole process knowing that he would do everything possible to help my family. He was always available whenever I wanted/needed information and went out of his way to get me resources. I would highly recommend Daniel Kollias to anyone searching for an attorney as well as use him again if ever needed.
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Posted by Julia | January 23, 2013
Daniel J Kollias is very trustworthy & knowledgeable!
I first retained Daniel for the divorce of my first marriage. When going through such a horrible time, you don't always have your head on right. Daniel helped get me through all the legal stuff I knew nothing about. He was/is quite knowledgeable and it made this whole situation much easier. I used him again for another issue with my ex-husband. My current husband also used him to try to have more custody with his three boys, which he did get the time he wanted.
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Posted by Jacquelyn | June 29, 2012
Dan Kollias
Dan's expert handling of my divorce case was beyond my expectations. He takes control, documents your facts and summarizes options for you throughout the process. You will always get a timely response by email or phone. He will not forget the facts in your case or be uprepared for milestones along the way. He will advise on important matters but act per your direction. Finally, he will maintain a positive and professional communication with all parties involved.
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Posted by Melanie | February 28, 2012
SOOOO helpful!!
I have already recommended Daniel to 2 other friends. He is VERY knowledgeable and prepared me for what to expect during a very difficult time in my life!
Posted by Larry | January 26, 2012
Estate Handling
After dealing with a different lawyer for several months going through probate on my parents estate, Dan was recommended to me. Within 30 minutes of talking with him on the phone I had 10 times more knowledge of the process, requirements, and timing to expect. I released my previous lawyer and immediately hired Dan to complete the handling of the probate. He kept me well informed through email and phone conversations and also deferred less critical tasks to his assistant which kept the overall costs down. I even received a check back from the retainer I had provided him. I would highly recommend Dan if you are in need of a lawyer or legal advice.
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Posted by Jim | March 29, 2011
Recent divorce client
Dan was very knowledgable and helpful. Even after the divorce and final payment he would offer support for simple questions. Throughout the process he was very cost conscious.
Posted by Matthew | March 15, 2011
Fantastic Lawyer
The first time I met with Dan, I was extremely stressed out about my legal situation. He was very quick to put me at ease, and has been willing to work with me at every turn. He is extremely professional and knowledgeable, and looks out for the best interests of his clients. I am extremely pleased with his services, and would highly recommend him to anyone who asks.
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Posted by Geoff | February 15, 2011
Excellent Lawyer!!!!
Dan is a excellent lawyer. He took over a case that had been poorly handled and stuck with it through its conclusion. I would highly recommend Dan to anyone in the divorce process. His strength is his ability to keep the client informed of the case progress. He is also very good at protecting a clients rights regarding assets and childrens issues.
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Posted by Lisa | January 20, 2011
Best divorce lawyer!!
I can never thank Dan enough for what he did for me. He was always one step ahead and had a plan of attack and a Plan B. In addition, he would give me many options in directions I could choose so my hands weren't tied. I also was amazed at his availability and honest concern for my well being. I've already refered him!
Posted by Chris | January 4, 2011
Termination of child support arrearages
Expertly handled a very complicated and unique case. When IL. Dept. of Revenue, Dept.of Family Services, I.R.S., U.S. State Dept., and ex-wifes attorney are saying I still owed $70,000 plus, Dan was able to prove to the courts and all others that I had in fact over paid, and put an end to wage garnishments and passport restrictions.
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  • Free Consultation 30 minutes
  • Retainer Always
Payment methods
Cash, Check, Credit Card


AVVO RATING 9.7 (Superb)

Work Experience

  • Owner / Managing Attorney
  • Kollias PC
  • 2020 - Present
  • Partner
  • Kollias & Giese, P.C.
  • 2014 - 2020
  • Partner
  • Mullen, Winthers & Kollias, P.C.
  • 2009 - 2014
  • Sole Practitioner
  • Law Offices of Daniel J. Kollias, P.C.
  • 2003 - 2009
  • Assistant State's Attorney
  • Cook County State's Attorney's Office
  • 1999 - 2001
View all work experience


  • Notre Dame Law School
  • JD - Juris Doctor
  • 1999
  • University of Michigan
  • BA - Bachelor of Arts
  • 1995

Legal Cases

  • Marriage of Rolseth
  • Affirmed on appeal.


  • DuPage County Bar Association
  • 2003 - Present

Languages Spoken

  • Greek

Speaking Engagements

  • Child Advocacy CLE Seminar
  • Child Custody Evaluations
  • 2013
  • DCBA Family Law Committee Meeting
  • Post Decree Paternity Challenges
  • 2009

Attorney endorsements

Received (22)
Given (16)
Endorse Daniel
Divorce and separation Attorney | Aug 01
Relationship: Opposing Counsel on matter
"I endorse this lawyer."
Family Attorney | Jul 11
Relationship: Fellow lawyer in community
"I have known Dan for at least 15 years. What I like about Dan is that he practices law the way it should be practiced. He tells you what he is going to do and then he does it. He stays on top of the cases and does a great job. People don't have great reputations just because they show up to work. They have great reputations because there are hard-working, honest, and deliver. That's what you get with Dan. Clearly he has become a leader in the area of family law."
Family Attorney | Jul 05
Relationship: Fellow lawyer in community
"Daniel is a strong litigator, but also a reasonable and sound negotiator. His knowledge of the law and practice are top notch. I endorse this lawyer."
Family Attorney | Jul 17
Relationship: Fellow lawyer in community
"I endorse this lawyer."
Divorce and separation Attorney | Jan 12
Relationship: Fellow lawyer in community
"I have known Mr. Kollias for over a decade and first worked with him in the Cook County State's Attorney's office. Mr. Kollias is intelligent, even-tempered and highly skilled in handling divorce and other family law matters. He is an experienced negotiator and is also known for his skills at trial and in hearings. Most importantly, Mr. Kollias conducts his practice with fairness and integrity."
Family Attorney | Jan 10
Relationship: Fellow lawyer in community
"I endorse this lawyer. I have known Mr. Kollias for many years. Early in his career, Mr. Kollias was an Assistant Cook County State's Attorney and then moved on to private practice. Mr. Kollias is an intelligent and dedicated professional who always strives to protect his clients' rights and to achieve the best possible outcomes. Without hesitation, I recommend this attorney for anyone in need of superior legal representation."
Family Attorney | Dec 12
Relationship: Opposing Counsel on matter
"I endorse this lawyer."
Family Attorney | Dec 01
Relationship: Opposing Counsel on matter
"I endorse and recommend this lawyer. Dan is a strong advocate for his clients, but always remains respectful to his opponents. Dan is very pleasant to work with."
Family Attorney | Sep 17
Relationship: Worked for lawyer
"I endorse this lawyer. Dan is an exceptional attorney who aggressively pursues his client’s goals all while epitomizing a model of civility in the courtroom. Dan is compassionate towards his clients and is able to effectively and efficiently reach a resolution in even the most complex cases. Dan is friendly, reliable, and knowledgeable in all areas of family law, as well as in the areas of estate and business planning."
Family Attorney | Apr 17
Relationship: Fellow lawyer in community
"Dan is a skilled and knowledgeable attorney experienced in divorce and family law matters in DuPage and surrounding collar counties. In my dealings with Dan, he has always been a zealous advocate for his clients, however is artfully able to settle cases when appropriate. Dan has always maintained a professional demeanor and is well respected by the judiciary and legal community as a whole."
Family Attorney | Apr 07
Relationship: Opposing Counsel on matter
"Dan is a fair and reasonable opponent. He is very responsive and is able to complete matters effectively and efficiently."
Family Attorney | Apr 07
Relationship: Fellow lawyer in community
"I endorse this lawyer. I have known Dan for many years and worked alongside him as an Assistant State's Attorney early in our careers. Dan has always exhibited the highest level of professionalism in the years I have known him. He has established himself as a known commodity in DuPage County and I never hesitate to refer him any civil/family law matter that I do not handle in my individual practice. Dan is skilled, experienced, aggressive and well-liked by his clients, court staff & the judiciary. Dan also has extensive bench and jury trial experience and is a very effective litigator as well. I would not hesitate to recommend his services to anyone in need of superior legal counsel."
Divorce and separation Attorney | Oct 04
Relationship: Fellow lawyer in community
"Dan is an honest, knowledgeable and effective attorney. He has a tremendous knowledge of the law and the ability to resolve matters efficiently."
Business Attorney | Jun 30
Relationship: Worked together on matter
"I endorse and recommend this lawyer. I have personally retained him to help me with a number of matters of my own."
Family Attorney | Jun 17
Relationship: Worked together on matter
"Dan is the type of attorney who knows the difference between paper law and people law. Dan is the lawyer you wish you had representing you when you're on the other side."
General practice Attorney | May 15
Relationship: Worked together on matter
"Dan is a brilliant lawyer whose understanding of the law is superb. He knows the relationship between the law and running a business because he is a business owner himself. I would trust him on any legal matter, especially any type of litigation. He is a ferocious fighter who knows what his clients need."
Child custody Attorney | Oct 28
Relationship: Fellow lawyer in community
"Dan and I have been opponents on some tricky cases involving rare family law issues. I have served as a guardian ad litem in some of Dan's cases. He is a tough litigator but never intimidates people. I like working with Dan very much, plus he is a sharp dresser."
Family Attorney | Mar 03
Relationship: Co-worker
"I consider Dan Kollias a "top tier" family law attorney. He is a strong advocate for his clients, is well prepared and a skilled litigator. Dan has an excellent reputation for being fair, honest and a highly professional attorney."
Family Attorney | Jan 04
Relationship: Opposing Counsel on matter
"I endorse this lawyer. While Dan was acting in his capacity as a Guardian ad Litem for 2 minor children, he showed nothing but respect and a will to get the parties to reach an amicable settlement. Dan went over and above his duties in meeting with the children's parents, multiple times, and cared only for the best interests of the children. I would GLADLY ask that Dan be appointed as a GAL in any of my cases, and would welcome working with him again in the future!"
Divorce and separation Attorney | Dec 28
Relationship: Fellow lawyer in community
"I enthusiastically endorse Dan Kollias. He is not only a talented and intelligent attorney, but he serves his clients while adhering to the highest ethical standards."
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Divorce and separation
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Divorce and separation
Divorce and separation
Criminal defense
Criminal defense
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