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About me

Donald J. Cosley has been representing Illinois residents in criminal defense and family law cases for over 20 years. He has a wealth of courtroom experience and an undying commitment to providing quality client service. He personally handles all aspects of his cases. When you call him with questions about your case, you will speak with him, your legal representative, and will not be passed off to a paralegal or subordinate. Extensive experience and responsive customer service are the hallmarks of the Law Offices of Donald J. Cosley.

  • Accessible: When you call, we make it a priority to respond quickly. We promise to give clear answers in language that makes sense.

  • Experience: Opposing attorneys, prosecutors and judges know that we have built our success on integrity and hard work. Knowing the key people involved in your case means understanding the process and expectations to reach a desirable outcome.

  • Reputation: Legal professionals throughout the Greater Chicago metro area know that we prepare our cases and arguments diligently and have our evidence and arguments in order. We have earned an excellent reputation for thoroughness and focused legal representation.

Free Initial Consultation

Donald J. Cosley was admitted to practice in Illinois and the Northern District Court of Illinois in 1994, and before the United States Supreme Court in 2001. He has served in the following committee positions for the NWSBA:

  • Parliamentarian 1999-2000

  • Board of Governors 2000-2003; 2003-2006

  • Executive Board:

    • Secretary 2006-2007

    • Treasurer 2007-2008

    • Vice President 2008-2009

    • Vice President 2009-2010

    • Executive Vice President 2010-2011

    • President 2011-2012

  • Long Range Planning Committee 2007-2008

He has also served as Chairperson for the Attorney Referral Service, Judges Night & Holiday Party, and as a coach or judge of mock trial from 2005 to 2008.


Languages spoken: Spanish

Practice areas


  1. Divorce: 55%
    23 years
  2. Speeding Ticket: 20%
    23 years
  3. DUI & DWI: 15%
    23 years
  4. Criminal Defense: 10%
    23 years


Payment types:

Cash, Check, Credit card

Attorney endorsements

8 total 

Are you an attorney? Endorse this lawyer

  • Stavri Vako Esq.

    Donald is a highly skilled criminal attorney. His experience gives him the ability to handle many different criminal matters. He is one of the most professional and ethical lawyers that I know. I do not hesitate to endorse this lawyer.


    Stavri Vako Criminal defense Attorney
    Relationship: Fellow lawyer in community

  • Steven H. Mevorah

    I endorse this lawyer.


    Steven Mevorah Personal injury Attorney
    Relationship: Fellow lawyer in community

Contact info

Cosley Don Atty-Lwyr

1855 Rohlwing Road
suite D
Rolling Mdws, IL, 60008


ILActive And Authorized To Practice Law199405/11/2016
We have not found any instances of professional misconduct for this lawyer.
Avvo contributions
Legal answers
Award nameGrantorDate granted
Preeminent 5.0 out of 5Martindale-Hubbell2016
Distinguished Alumni AwardBuffalo Grove High School2005
Work experience
TitleCompany nameDuration
AttorneyCosley Law Office2003 - 2015
Association namePosition nameDuration
Northwest Suburban Bar AssociationChairman2003 - Present
Northwest Suburban Bar AssociationChairman2000 - Present
Northwest Suburban Bar AssociationChairman1999 - Present
Illinois State Bar AssociationMemberN/A
Northwest Suburban Bar AssociationMemberN/A
Northwest Suburban Bar AssociationPresident2011 - 2012
Northwest Suburban Bar AssociationBoard of Governor2003 - 2006
Northwest Suburban Bar AssociationChairman2001 - 2003
Northwest Suburban Bar AssociationBoard of Governor2000 - 2003
Northwest Suburban Bar AssociationParlimentarian1999 - 2000
School nameMajorDegreeGraduated
John Marshall Law School, ChicagoLawJD - Juris Doctor1994
DePauw UniversityPolitical ScienceBA - Bachelor of Arts1991
Speaking engagements
Conference nameTitleDate
School District 214Traffic Seminar2010