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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
Avvo Review Score
101 Client Reviews
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Practice Areas
What Clients Mention
Showing 1 - 5 of 22 reviews | Practice Area Knowledge
Posted by Kenny | November 16, 2025 | Hired Attorney | Lawsuits & Disputes
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 Kim | October 29, 2025 | Hired Attorney | Criminal Defense
Case dismissed
I had a assault on a family member charge and she told me from the beginning she can get it dismissed.She definitely did what she said she was going to do.I highly recommend her for sure!!!
Posted by Brandon | May 03, 2020 | Hired Attorney | Sex Crime
My Guardian Angel
I'm late on this post due to personal matters but I need everyone to know that Diana is amazing! From what I've found out, fighting sexual assault allegations could be tricky, but she guided me thru the process effortlessly. Having to go trial she was a master in the the courtroom. Her years of exper...
Posted by Keith | March 31, 2019 | Hired Attorney | DUI & DWI
One of Houston’s best lawyers
I Keith hired Ms. Diana for a dwi and she had it dismissed, she took the case with no hesitation and done an excellent job, she is possibly the best dwi lawyer in Houston I promise you...
Posted by Carol | November 17, 2018 | Hired Attorney | Criminal Defense
Would rehire if needed
I would not hesitate to rehire Ms.Sims if the need ever should arise again. She professionally and efficiently handled a very touchy case for my family. Her years of experience really eased us through a very difficult arrest and charges. She’s a solid choice for representation.
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
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Joseph Vinas
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Jimmy Ortiz
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Edward Okwueze
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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
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Mary Conn
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Cynthia Henley
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Feroz Merchant
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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