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Diana Elizabeth Sims
also known as Diana E. Sims, Diana Sims
About Diana
Biography
I am a criminal defense attorney with over 25 years of experience. I am passionate about bringing justice to my clients. Through my years of practicing, I have learned that the best way to achieve the most favorable outcome for my cases is to be patient, persistent and diligent. I absolutey love my job. It gives the ability to make a positive impact in the lives of my clients.
I am a native Houstonian. I went to the University of Texas at Austin and the University of Houston Law Center for law school. I decided I wanted to be a lawyer, when I was eight years old. I absolutely feel in love with advocacy watching LA Law, as a young girl. I graduated law school at 23 and decided to go out on my own right away. I have a passion for being a criminal defense attorney. It’s nice to be able to have a career that you absolutely love. I get inspired by being to help people in need. I love representing people, when they need someone to stand up for them.
Practice Areas
2
Practice Areas
Criminal Defense
95%
26 years
Expungement
5%
26 years
Fees and Rates
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Chat withLicenses
Licensed in Texas for 26 years
State: Texas
Acquired: 1999
No misconduct found
Location
Law Offices of Diana Elizabeth Sims
411 Fannin Suite 250, Houston, TX, 77002
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Diana Elizabeth Sims's Reviews
Showing 1 - 5 of 101 client reviews from Avvo
Posted by Kameron | January 9, 2026 | Hired Attorney
This review is from a person who hired this attorney.
Case dismissed
She said she would get it dismissed and she made it happen like she said she would
Posted by Peggy | January 6, 2026 | Hired Attorney
This review is from a person who hired this attorney.
This young lady has the proven proof of being a prudent defense attorney.
Thank you for your expertise with defending my son’s innocence. May GOD continue to bless you in all of your endeavors.
Posted by anonymous | January 5, 2026 | Hired Attorney
This review is from a person who hired this attorney.
Case dismissed
Diana Sims did exactly what she told me she could do. Get my case dismissed. I was uneasy about the whole situation but she kept me calm, and assured me it’s going to be okay. I would recommend her to any one dealing with these kind of situations she specializes in! Thank you Diana Sims!
Posted by Kenny | November 16, 2025 | Hired Attorney
This review is from a person who hired this attorney.
A Real Go Getter
I would like to take this moment to thank this attorney for the outstanding professional customer service in handling my case. From the first day she assured me that she would keep me informed and I would have no worries as she will work to bring this case to a positive end. Her communication skills...
Posted by anonymous | November 4, 2025 | Hired Attorney
This review is from a person who hired this attorney.
She is Amazing!!!
Diana went above and beyond. Case was dismissed. I couldn’t have been more happy with her hard work and effort!!
Diana Elizabeth Sims's Lawyer Endorsements
"I endorse this lawyer. Diana is a warrior in the fullest extent of the word. I have known her since I was in law school and she commands respect in a courtroom. I would highly suggest her services"
"Diana is a wonderful person and lawyer. She works very hard for her clients and knows the law. She will take good care of you. -Mark"
"I have known Diana Sims for over ten years. Diana fights hard for her clients and she knows the law."
"Diana is a hard working criminal defense attorney. I frequently see her in the courthouse working diligently for her clients. She displays a level of caring and confidence when arguing on behalf of her clients."
"I endorse this lawyer. Diana is an outstanding trial lawyer, always getting not guilty verdicts because of her tremendous skills and dedication to her craft, anybody who hires her has a true warrior who is well respected in the legal community"
"I endorse Diana. She is as passionate as they come about righting wrongs. When you have her on your side, you have a true gladiator in your corner."
"Diana Sims is an experienced, highly respected attorney who always represents her clients with the utmost of skill,knowledge and understanding.i can readily endorse her without hesitation or reservation."
"I have known Diana Sims for over 15 years and I have seen her zealously fight for her clients. She is certainly no push over when it comes to dealing with prosecutors. I certainly endorse her as an attorney."
"I endorse this attorney. Diana is a passionate attorney who works hard to protect the rights of every client. She is a strong advocate and extremely knowledgeable of the law."
"I endorse this lawyer. Diana is passionate about her work and clients. She has incredible experience and know how!"
"I endorse this lawyer. Knowledgable and someone that always fights for her clients - getting great results."
"Diana is a fierce fighter for her clients. I've never seen her back down from a fight! I am happy to endorse this lawyer."
"I endorse this lawyer. Diana never backs down from a fight. She is strong and well respected. And her clients love her!"
"I endorse this lawyer."
Jeanie Ortiz
Criminal defense lawyer
Joseph Vinas
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Eduardo Cortes
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Jimmy Ortiz
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Edward Okwueze
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Murray Newman
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Rand Mintzer
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Philip Gommels
Criminal defense lawyer
Maverick Ray
Criminal defense lawyer
Penny Wymyczak-White
Criminal defense lawyer
Jennifer Sims
Criminal defense lawyer
Arthur Sims
Criminal defense lawyer
Mary Conn
Criminal defense lawyer
Cynthia Henley
Criminal defense lawyer
Feroz Merchant
Criminal defense lawyer
Tyrone Moncriffe
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Christopher Carlson
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Lewis Thomas
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Nathan Hennigan
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Lisa Shapiro
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Experience
Honors
2022
Top 100 Trial Lawyers, National Trial Lawyers
2021
Top 100 Trial Lawyers, National Trial Lawyers
2020
Top 100 Trial Lawyers, National Trial Lawyers
2019
Top 100 Trial Lawyers, National Trial Lawyers
2018
Client Rating, Martindale-Hubbell
Work Experience
1999 - Present
Attorney, Law Office of Diana E. Sims
Associations
1999 - Present
Harris County Criminal Lawyers AssociationMember
1999 - Present
Texas Criminal Defense Lawyers AssociationMember
1999 - Present
Houston Bar AssociationMember
Education
1999
University of Houston Law Center
JD - Juris Doctor
1996
University of Texas
BA - Bachelor of Arts
Languages
English
Activity
Legal Answers
Legal Answers
Q&A
If the driver writes an affidavit and claims the charges can he be convicted
07 Oct 2021
Q&A
How serious is this charge DEL CS PG 1-B>=4G<200G ?
22 Sep 2021
Q&A
What is the average time for ASSLT INT/RCK/IMP/BRTH/CIRC/PR in Harris county?
18 Sep 2021