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Mark understands that being charged with a crime is an emotional and personal challenge. He considers criminal defense his life’s work, and he is committed to providing each client with personalized attention, affordable representation, and the best defense available anywhere. Mark prides himself on his ability to quickly respond to the needs and concerns of his clients. In the realm of criminal defense, questions and concerns can’t always wait until morning. Mark’s clients receive his cell phone number, so they can connect any time they need help. From arrest through trial, Mark works hard to get the best possible results in and out of court.
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$0 first 60 minutes
State: Texas
Acquired: 1998
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10 Client Reviews
Showing 1 - 3 of 3 reviews | DUI & DWI
Posted by Angela | June 22, 2017 | Hired Attorney | DUI & DWI
Fantastic attorney
Mark Diaz is one of the best lawyers in the business. I have never in my life met someone so easy to communicate with and or work with when making decisions with my cases in DWI and several other personal cases involving my ex husband. I absolutely refuse to use anyone else because Mark is so friendl...
Posted by David | February 10, 2016 | Hired Attorney | DUI & DWI
Amazing Attorneys
I hired Katy Jo Muncie with the Diaz firm who handled the lead on my 2 DWI charges in different counties. Along with Mark Diaz, Katy Jo was there for me every step of the way. After firing my first attorney, I was very nervous about what my outcome would be. Katy Jo was patient and worked the sys...
Posted by Martin | January 27, 2015 | DUI & DWI
Very easy to work with!
Throughout my trials Mark Diaz and Katy Jo Muncie worked side by side and handled my case with ease. Aside from initiating my first consultation over the phone and making my appearances to court, I held zero responsibility throughout the process. When my case was settled, my DWI charge was reduced to...
"I endorse this lawyer. Mark has a reputation as one of the best lawyers in Galveston. He is fluent in Spanish. Mark works hard to protect the interests of his clients and obtain the best possible result in each case."
"I met Mr. Diaz my first time fighting for defendants in custody. He helped teach me how I could maintain my client's individual dignity in a place that so often discards it. The fact that such a passionate and knowledgeable attorney was fighting for misdemeanor custody cases shows that he cares and fights for every single client, no matter what. I fully endorse him."
Appeals lawyer
Criminal defense lawyer
2025
Super Lawyer, Super Lawyers
2024
Super Lawyer, Super Lawyers
2023
Super Lawyer, Super Lawyers
2021
Top 100 Trial Lawyers, National Trial Lawyers Association
2020
Top 100 Trial Lawyers, National Trial Lawyers Association
2019
Top 100 Trial Lawyers, National Trial Lawyers Association
2018
Top 100 Trial Lawyers, National Trial Lawyers Association
2017
Top 100 Trial Lawyers, National Trial Lawyers Association
1998 - Present
Attorney, Mark A Diaz, Attorney at Law
2010 - Present
Harris County Criminal Lawyers AssociationMember
2016 - 2017
Galveston County Criminal Defense Lawyers AssociationPresident
2015 - 2016
Galveston County Criminal Defense Lawyers AssociationPresident-Elect
2008 - 2009
Galveston County Criminal Defense Lawyers AssociationTreasurer
1998
JD - Juris Doctor
1995
BA - Bachelor of Arts
Spanish
English
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