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Mark G. Henness is a Las Vegas personal injury attorney and founding partner of Henness & Haight, Injury Attorneys. Since 2000, he has dedicated his practice exclusively to representing people who have been injured through the negligence of others.
Mr. Henness began his legal career on the other side of personal injury litigation. After earning his law degree in 1995, he worked for the Nevada Attorney General’s Office, where he defended state entities including the Nevada Department of Transportation. He later joined the regional law firm Broening, Oberg, Woods, Wilson & Cass, where his practice focused primarily on insurance defense and insurance bad faith defense.
That experience gave Mr. Henness valuable insight into how insurance companies and defense attorneys evaluate, defend, and resolve injury claims. Today, he uses that knowledge to advocate for injured individuals and families throughout Las Vegas and Nevada.
As a founding partner of Henness & Haight, Mr. Henness handles a wide range of personal injury matters, including car accidents, truck accidents, motorcycle accidents, pedestrian injuries, premises liability, defective products, catastrophic injuries, and wrongful death claims. He has successfully tried numerous cases to verdict and has recovered millions of dollars from insurance companies on behalf of his clients.
Henness & Haight has represented injured people in Las Vegas since 2000 and has recovered more than $500 million for its clients. The firm approaches every case with the expectation that it may ultimately need to be presented to a jury, while maintaining a strong emphasis on personal service and direct communication with clients.
Mr. Henness has been recognized by a number of legal organizations and publications, including The National Trial Lawyers Top 100, the National Association of Distinguished Counsel, Nevada Business Magazine’s Legal Elite, and the American Institute of Personal Injury Attorneys. He is also a member of the Million Dollar Advocates Forum and Multi-Million Dollar Advocates Forum, organizations recognizing attorneys who have obtained significant verdicts and settlements.
Mr. Henness was born and raised in Beaverton, Oregon, and first came to Las Vegas to attend the University of Nevada, Las Vegas. He graduated with distinction with a Bachelor of Arts in Theatre before returning to Oregon to attend Willamette University College of Law. He earned his Juris Doctor in 1995 and returned to Las Vegas to begin his legal career.
Outside of the office, Mr. Henness enjoys spending time with his wife and four children, playing tennis and golf, playing guitar, and performing close-up magic.
2
Practice Areas
Free Consultation
$0 first 60 minutes
State: Nevada
Acquired: 1995
No misconduct found
Fax
8972 Spanish Ridge Avenue, Las Vegas, NV, 89148
hennessandhaight.com/Other places you can find Mark online.
14 Client Reviews
AI-summarized from Avvo client reviews
Showing 6 - 10 of 14 reviews
Posted by John | August 25, 2026 | Hired Attorney
# 1 Law Firm
This lawyer is phenomenal!!! If there were a scale of 1 to 10 he would surpass the max and excel to a 12!!! Thank you for everything you’ve done Mark and your right hand girl, Leanne. I would recommend this duo to anyone who in need of a honest, caring and professional legal counsel. They are go ...
Posted by Jan | August 25, 2026 | Hired Attorney
Great Experience
I had a great experience with this law firm from start to finish. The entire team was professional, responsive, and made me feel supported throughout the process. A special thank you to Leanne, who was incredibly warm, kind, and welcoming every step of the way. She took the time to answer my question...
Posted by anonymous | August 24, 2026 | Hired Attorney
What a relief to use Henness & Haight Personal Injury
I cannot say enough wonderful things about Henness & Haight and their entire office. From the very beginning, I felt heard, respected, and genuinely cared for. They were professional, knowledgeable, responsive, and went above and beyond throughout the entire process. The entire staff was kind, helpfu...
Posted by Brittany | August 24, 2026 | Hired Attorney
The best in the business!!!!!
Absolutely amazing experience from start to finish. They made a stressful situation feel easy, always kept me informed, and truly made me feel cared for every step of the way. I’m so grateful for their kindness, professionalism, and support. I would wholeheartedly recommend them to anyone in need of ...
Posted by T | August 24, 2026 | Hired Attorney
Great representation...with great results!
The team here was very empathetic of my situation and kept me informed every step of the way. During this process there are some variables that can cause frustrating delays, but the staff here ensured that I always knew that they were on top of the case to make sure that my matter was handled promptl...
"I endorse this lawyer. As a commercial attorney with over 40 years of experience, I have dealt with hundreds of lawyers. When asked for a referral to a personal injury attorney, I think of Mark Henness without hesitation. He and the team at Henness & Haight have always treated my friends and clients with respect, professionalism, and integrity while getting excellent results."
"I have known Mark Henness for more than thirty years, both as a colleague and as a friend. My practice is primarily transactional and estate-focused, so personal injury matters that come to my office get referred out — and his firm is at the top of my list. He is thorough, well-prepared, and has real depth of knowledge in this area of law. Over the years I have referred not only clients but friends and members of my own family to him, and I have never once hesitated in doing so. Mark is a man of character with a moral compass that is a credit to our profession, and he carries that same integrity into the way he advocates for his clients. I recommend him without reservation and hold him in the highest regard."
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2011
Super Lawyer, Super Lawyers
2008
Super Lawyer, Super Lawyers
N/A
Top 100 Trial Lawyers, National Trial Lawyers
N/A
Legal Eilte, Nevada Business Magazine
2000 - Present
Partner and Owner, Henness & Haight Injury Attorneys
Board of Governors
Member
1995
JD - Juris Doctor
1991
English