Lawdog Security & Investigations
“I was really pleased with the service I received from Law Dog on a surveillance job.”
Best Private Investigators near Hammond, IN
These agencies serve Hammond from nearby bases in Chicago, IL, Oak Lawn, IL and Crown Point.
10 agencies listed · 4 open 24/7 · 8 open weekends · 8 rated 4.5+ · 4 show a license
Data verified November 10, 2026
Lawrence Ryan Investigations
“Highly recommended to everyone else because of their great staff and service.”
Lake County Civil Process
“He had the papers served in a few hours (we were on a deadline) and notified me immediately that they had been served so that I could breathe easy.”
Omega Global Security
Northshore Process Service Network
“I highly recommend Northshore Process, they are very reliable, professional and have amazing customer support.”
RA Private Investigation & Security
“A+ Excellent response time, really helped us understand the process of a private detective, worth a call if you're in the Chicago area.”
The 10 agencies on this page are the private investigators listed for Hammond, IN. 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: Hammond, IN
The 10 agencies on this page are rated from 4.0 to 5.0 across 305 reviews; 2 have 50 or more reviews and 8 are rated 4.5 or higher. 4 are open around the clock; 8 are open on Saturdays and 7 on Sundays. 4 show a license on their websites and 2 have a BBB rating of A or A+. 7 have ten or more years of experience, the longest 42 years. 4 offer urgent consultations and 5 offer a free initial consultation. We have a website on file for all 10 of the agencies on this page; 9 publish a contact page and 8 list a public email. We count these figures across the agencies on this page; hours and prices change, so confirm the details with the agency before you book.
Which investigators listed for Hammond describe their work online?
All 10 agencies on this page have a website on file. Those pages are where an agency states its license, the kinds of investigation it takes on, and whether it works mainly for attorneys, for companies or for private clients. That last point changes how a report gets written.
PCI Investigations
“Really helped me when I needed it the most!!”
Heritage Investigations & Surveillance
“Definitely will do everything they can to get the job done.”
Ingenium Consulting Group
“Called Ingenium the took care of all the problems.”
Chicago Private Investigator
“From interviewing witnesses to getting documents, police reports, medical records, (and anything else), Bob always comes through very quickly.”
Why these companies made our list
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