About the Attorney

John Hartmann, Esq. is a highly experienced criminal justice attorney based in Princeton Junction, New Jersey. With a strong track record of successfully defending clients facing a variety of criminal charges, John is dedicated to providing top-notch legal representation and ensuring that his clients receive fair treatment under the law. Specializing in criminal defense, John has a reputation for fighting tirelessly for his clients’ rights and achieving favorable outcomes in even the most challenging cases. Whether you are facing misdemeanor or felony charges, John Hartmann, Esq. is the attorney you can trust to protect your rights and advocate for your best interests. Contact him today for a consultation and see why the second “n” in his name stands for not guilty.

Practice Areas

Criminal justice attorney

Client Reviews

Lauren Travaglini

4/21/2026

I can’t recommend John enough. He helped me through my first offense—something I had no experience with and was honestly overwhelmed by. Even though my case took over a year due to court delays, John stayed in consistent contact, kept me fully informed every step of the way and made sure I always knew what to expect, reassuring me things would be okay in life no matter the outcome.

In the end, he was able to get my case resolved with the absolute minimal sentence possible, which I’m incredibly grateful for. I actually cried tears of joy knowing he helped me so much so I can finally breathe the biggest sigh of relief. He’s responsive, genuinely cares and will absolutely work in the best interest of his clients.

If you’re going through a difficult time and need someone you can trust, John is the person you want on your side. Thank you again for everything, John.