Private investigator
A P Private Detective & Security Agency
17084 Winchester Ave, Hazel Crest, IL 60429, United States
Private Investigator in Illinois
Find private investigator businesses in Illinois with ratings, reviews, phone numbers, websites, addresses, hours, and directions.
Consultant
RedHawk Investigations & Security
1030 W Chicago Ave 3rd Floor, Chicago, IL 60642, United States
Private investigator
Confidential Protective Services
7627 Lake St Suite 206, River Forest, IL 60305, United States
Private investigator
Mid-West Protective Service, Inc.
5240 Irving Park Rd, Chicago, IL 60641, United States
Security guard service
Advanced Security Solutions, Inc.
2800 S River Rd, Des Plaines, IL 60018, United States
Private investigator
Lawrence Ryan Investigations
1363 Shermer Rd Suite 337, Northbrook, IL 60062, United States
Private investigator
Chicagoland Detective Services
4425 W Irving Park Rd, Chicago, IL 60641, United States
Fingerprinting Service Provider
S A Y F Consulting
2911 N Cicero Ave, Chicago, IL 60641, United States
Private investigator
Millennium Investigations, Inc.
847 Randall Rd #125, Elgin, IL 60123, United States
Private investigator
Fact Finders Group, Inc
4747 Lincoln Hwy Ste 300, Matteson, IL 60443, United States
Fingerprinting Service Provider
Intelligents ETV - Live Scan Fingerprinting & Background Checks
2555 Lincoln Hwy # 203, Olympia Fields, IL 60461, United States
Security guard service
Centurion Investigations & Security Agency
4246 W 63rd St, Chicago, IL 60629, United States
Security guard service
United Protection Agency, Inc.
1634 W 63rd St, Chicago, IL 60636, United States
Private investigator
RA Private Investigation & Security Inc.
2935 S Halsted St, Chicago, IL 60608, United States
Security guard service
Chicago Serve Security Guards
11340 W 159th St, Orland Park, IL 60467, United States
Browse private investigator businesses across Illinois
This Illinois category page highlights active private investigator listings and points visitors toward cities with stronger local coverage.
How are listings organized?
Listings are grouped by state, city, and category so visitors can browse local business data without relying on broad search filters.
Which pages are indexable?
Pages with at least three active listings can be indexed. Smaller result sets stay available to users but are marked noindex until more data is added.
Can I contact businesses directly?
Yes. Available phone, website, and directions links are shown on listing cards and business detail pages.