Magnum Investigations
“He professional, knowledgeable, and an absolute pleasure to work with and couldn't be happier, definitely recommend Magnum!”
Best Private Investigators near Hamilton, NJ
These agencies serve Hamilton from nearby bases in towns including Trenton, Levittown, PA and Princeton.
10 agencies listed · 8 open 24/7 · 9 open weekends · 7 rated 4.5+ · 2 show a license
Data verified October 18, 2026
Stallion Investigations and Security
“John was very professional very well priced and very fast with the services that I requested from him highly recommend him for anything that you would need made my whole experience super easy”
Searching For the Truth
“He is patient, incredibly knowledgeable, and flexible to meet the needs of your situation.”
Klein Investigation
“He was immediately responsive and was able to get me the info I needed within the hour.”
Carl Defazio Private Investigations
Assets Protection
The 10 agencies on this page are the private investigators listed for Hamilton, NJ. What each one states about its license, its specialties and the areas it covers comes from its own website; ratings and quotes come from public reviews.
Area overview: Hamilton, NJ
The 10 agencies on this page are rated from 4.0 to 5.0 across 217 reviews; 2 have 50 or more reviews and 7 are rated 4.5 or higher. 8 are open around the clock and 9 are open on weekends. 2 show a license on their websites. Domain records put 6 websites of the agencies on this page at ten or more years old; the oldest dates from 1999. 8 offer urgent consultations and 3 offer a free initial consultation. 1 has Spanish-speaking staff. We have a website on file for 9 of the agencies on this page; 7 publish a contact page; 7 list a public email and 1 takes bookings online. We count these figures across the agencies on this page; hours and prices change, so confirm the details with the agency before you book.
Do investigators listed for Hamilton discuss a case free?
3 of the 10 agencies state that a first consultation costs nothing. Use it to describe the problem and hear whether the work can be done lawfully at all. A straight agency will sometimes tell you on that call that what you want cannot be obtained, which saves you a retainer.
R.Q. Investigations
“I highly recommend his services to anybody who suspects they are being cheated on.”
RJM Investigations
“They were empathetic regarding the sensitive nature of my case and really helped me stay grounded by keeping me well informed.”
Platinum Investigative Services
Targeted Investigations Group
“And he did all this remotely (since I live 1,000 miles away from New Jersey); I hope to meet him in person someday to thank him again for his caring and thorough investigation.”
Why these companies made our list
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