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About me

I have been practicing law for 16 years in Southern California. I have always rooted for the underdog and I have always wanted to help others. In the world of criminal law, this makes me a defense attorney. If you have ever been to court or if you or a loved one has been arrested, you know that it feels as if the entire system is working against you. My goal is to be the one person who is on your side. I have developed strong relationships with the judges and prosecutors in Southern California that allow me to get results for my clients. I know when the time is right to take a deal and when a case should go to trial.

Many lawyers in Southern California call me for advice on criminal and juvenile law matters every day. Why hire someone else and have them seek my help when you can put me to work directly for you? I know my way around the system and I have the skills to make sure that your case does not become another statistic. You will receive personal service from beginning to end and I will take the time to get you the best possible result.


  • University of San Diego-Bachelor of Arts-Philosophy

  • Universidad de Guadalajara-Summer Abroad Program

  • Pepperdine University School of Law-Juris Doctorate


  • State Bar of California-No history of discipline

  • US District Court-Southern District of California

  • Orange County Bar Association

  • Liability Insurance Policy in full force and effect

  • California DUI Lawyers Association

  • National College for DUI Defense



Languages spoken: Spanish

Photos and videos

291717 1237917007

Practice areas


  1. DUI & DWI: 50%
    17 years
  2. Speeding Ticket: 25%
    17 years
  3. Criminal Defense: 25%
    17 years



Hourly ($300-350/hour), Fixed (always)

Payment types:

Cash, Check, Credit card

Attorney endorsements

22 total 

Are you an attorney? Endorse this lawyer

  • Nicholas Milan Loncar

    Mark is like an encyclopedia of Southern California Criminal Defense. He is a great lawyer and gets great results for his clients. I endorse this lawyer.


    Nicholas Loncar Criminal defense Attorney
    Relationship: Fellow lawyer in community

  • Erin N. Collins

    I endorse this lawyer. Mark is extremely knowledgeable, and is well known in the legal community as an effective advocate for his clients.


    Erin Collins Criminal defense Attorney
    Relationship: Fellow lawyer in community

Contact info

Law Offices of Mark A. Gallagher

1400 North Harbor Blvd
Suite 650
Fullerton, CA, 92835


We have not found any instances of professional misconduct for this lawyer.
Avvo contributions
Legal answers
Work experience
TitleCompany nameDuration
OwnerLaw Offices of Mark A. Gallagher2006 - Present
AttorneyWallin & Klarich A Law Corporation2004 - 2005
AttorneyOrange County Public Defender's Office2001 - 2004
Association namePosition nameDuration
National College of DUI DefenseMember2008 - Present
California DUI Lawyers AssociationMember2008 - Present
Orange County Bar AssociationMember2000 - Present
School nameMajorDegreeGraduated
Pepperdine University School of LawLawJD - Juris Doctor2000
University of San DiegoN/AUndergraduate1996
Speaking engagements
Conference nameTitleDate
Handling First DUI in CaliforniaCalifornia DUI law2011