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PRO
also known as James Tanner Duncan
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J. Tanner Duncan is a Cincinnati-born criminal defense attorney who takes the fight head-on—and doesn’t back down. Practicing in both Ohio and Kentucky, he handles everything from life-altering felony charges to misdemeanors and traffic offenses, bringing the same aggressive, results-driven approach to every case.
From investigation through trial, Tanner is strategic, relentless, and built for high-stakes defense. He has handled cases involving murder, shootings, sex crimes, DUI/OVIs, domestic violence, and more—where the consequences can follow a client for life. He prepares every case for trial, challenges every piece of evidence, and forces the prosecution to prove its case.
Tanner thrives in the courtroom while others avoid it. He makes sure clients understand exactly what’s at risk—whether it’s jail time, permanent records, registration requirements, license suspensions, or firearm restrictions—and builds a defense designed to protect their future.
Licensed in both Ohio and Kentucky, Tanner is uniquely positioned to handle cases with cross-state consequences, including probation, parole, and license issues. His approach is simple: take control early, apply pressure, and fight relentlessly to win.
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Practice Areas
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State: Kentucky
Acquired: 2021
No misconduct found
State: Ohio
Acquired: 2019
No misconduct found
12 E. Warren Street, Lebanon, OH, 45036
3734 Eastern Avenue, Cincinnati, OH, 45226
121 West High Street, Oxford, OH, 45056
9078 Union Centre Blvd. Suite 350, West Chester, OH, 45069
401 Scott St., Covington, KY, 41011
4555 Lake Forest Drive Suite 650, Cincinnati, OH, 45242
3805 Edwards Road Suite 550, Cincinnati, OH, 45209
102 Client Reviews
Showing 11 - 15 of 102 reviews
Posted by Philomena | December 17, 2025 | Hired Attorney
Professional lawyer
Really professional,takes time to explain all details,good communication skills.
Posted by Brooke | December 12, 2025 | Hired Attorney
Beast mode
Tanner went above and beyond for us. He was very professional, punctual, and informative during our whole process. I will recommend him to any and everyone that needs counsel!
Posted by anonymous | October 28, 2025 | Hired Attorney
Highly Recommend
Tanner is a truly compassionate professional who is dedicated to achieving the best possible outcome for his clients.
Posted by Gill | October 27, 2025 | Hired Attorney | Criminal Defense
HOME RUN!!!
I called Tanner with a problem and he fixed it!!! No funny business, no plea deals, no back and forth, he just fixed the problem with a full dismissal!! If you want results, Tanner Duncan is the man that can get them!!!
Posted by anonymous | October 26, 2025 | Hired Attorney
Knowledgable, Prompt and Efficient
Tanner took time to answer my questions as issues arose and kept me updated throughout the process. Great service!
"I endorse this lawyer. Tanner is smart, talented, hard-working, and kind. I appreciate his vigorous representation of his clients."
"Tanner is a fantastic criminal defense attorney. He is hardworking and dedicated to getting his clients the best outcome. He is well known in most courts in the Greater Cincinnati area and that reputation carries over to his interactions with judges and prosecutors. Would highly recommend."
"Tanner is a bright, motivated, and aggressive lawyer. He cares deeply about his clients and works tirelessly to get the best result possible. I endorse Tanner without reservation."
"Not only does Tanner have the intelligence and experience to aggressively represent his clients at the highest level, he genuinely cares about his clients and the outcome they receive. I would stand next to Mr. Duncan in any type of criminal matter with confidence."
Criminal defense lawyer
2019
Cum Laude, Northern Kentucky University - Salmon P. Chase College of Law
2019
Dean's List, Northern Kentucky University - Salmon P. Chase College of Law
2019
Order of the Barristers, Northern Kentucky University - Salmon P. Chase College of Law
2019
Law Review - Associate Editor, Northern Kentucky University - Salmon P. Chase College of Law
2018
Dean's List, Northern Kentucky University - Salmon P. Chase College of Law
2018
Law Review - Associate Editor, Northern Kentucky University - Salmon P. Chase College of Law
2017
Dean's List, Northern Kentucky University - Salmon P. Chase College of Law
2016
Dean's List, Northern Kentucky University - Salmon P. Chase College of Law
2025 - Present
Trial Attorney, Rittgers & Rittgers
2021 - 2025
Trial Attorney, Suhre & Associates, LLC
2019
JD - Juris Doctor
2014
BS - Bachelor of Science (History)
2024
2024
Criminal Defense Practice
English