Trusted Eye Investigations
“He also speaks Spanish , which was a great help in his serving capacity.”
Best Private Investigators near San Marcos, CA
1 of these agencies is based in San Marcos; the others serve San Marcos from San Diego (21 mi), Oceanside (10 mi) and Chula Vista (36 mi).
5 open 24/7 · 9 open weekends · 6 rated 4.5+ · 7 show a license
Data verified October 15, 2026
Westcoast Security & Investigative Agency
“"Great group and staff of security officers.”
Baker Street Group
“The Baker Street Group is knowledgeable, professional and delivers results in an expedient manner!”
Able Legal Investigations
“I had a deadline sensitive job to be done and they promptly took it to task and had the needed information from 1977 with in 3 days.”
Blue Line Public Safety
Batza & Associates
The 10 agencies on this page are the private investigators listed for San Marcos, CA. 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: San Marcos, CA
8 of the 10 agencies on this page have a rating, from 4.2 to 5.0 across 174 reviews; 2 have 50 or more reviews and 6 are rated 4.5 or higher. 5 are open around the clock; 9 are open on Saturdays and 8 on Sundays. 7 show a license on their websites and 1 has a BBB rating of A or A+. 6 have ten or more years of experience, the longest 28 years. 5 offer urgent consultations; 4 offer a free initial consultation and 1 is family- or locally-owned. We have a website on file for all 10 of the agencies on this page; 8 publish a contact page and 6 list a public email. We count these figures across the agencies on this page; distances are straight-line, and hours and prices change, so confirm the details with the agency before you book.
Which investigators listed for San Marcos 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.
Ernest Smith Investigations
“You can tell that they REALLY want to help you, someone who really wants to get to the bottom of things!”
Oceanside Investigations
“Rick definitely knows what he's doing and is trustworthy, and I never say that.”
Becker & Becker Investigations
“The investigator that I dealt with was just Superb, absolutely top of the line service from start to finish.”
Fullcircle Investigations INC
“He is very knowledgeable and takes his time to listen the the needs of the client and develops a game plan for the best possible results.”
Why these companies made our list
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