Carlson Investigations
“Whatever your needs, look no further than Carlson Investigations as they will get the job done in record time.”
Best Private Investigators near Des Plaines, IL
These agencies serve Des Plaines from nearby bases in towns including Chicago, Arlington Heights and Rosemont.
14 agencies listed · 4 open 24/7 · 8 open weekends · 11 rated 4.5+ · 9 show a license
Data verified October 18, 2026
Confidential Protective Services
“I have used his services a few times and he is always professional, on time and very knowledgeable.”
Foresight Investigative Services
“The investigator is extremely knowledgeable, thorough, and highly professional.”
Blue Star Security
“A quick thank you to Blue Star Security for handling last minute security for our family business.”
U.S. Security and Protective Services
“Very professional place well structured i recommend them for their services!!!!”
International Protective Services
The 14 agencies on this page are the private investigators listed for Des Plaines, IL. 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: Des Plaines, IL
The 14 agencies on this page are rated from 3.2 to 5.0 across 495 reviews; 1 has 50 or more reviews and 11 are rated 4.5 or higher. 4 are open around the clock; 8 are open on Saturdays and 5 on Sundays. The services the agencies on this page list most often on their websites are background investigations (2), child custody (2), corporate investigations (2), locate investigations (2) and surveillance (2). 9 show a license on their websites. 11 have ten or more years of experience, the longest 28 years. 4 offer urgent consultations; 2 offer a free initial consultation; 1 is family- or locally-owned and 1 lists coupons or special offers. We have a website on file for all 14 of the agencies on this page; 13 publish a contact page and 13 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 Des Plaines describe their work online?
All 14 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.
Citywide Security Group
Forest Security
“Great customer service and goes above and beyond for his customers.”
Myers Service
“I spoke to Nerdisa and she was knowledgeable and gracious in answering all of my questions and I had many.”
Hogan Investigative Services
“The service was prompt, professional, and a reasonable price.”
Special Solutions
“He was very compassionate about my situation and was very professional and helpful.”
Vander Weele Group
“I really think these people are the most caring, helpful and dedicated individuals!”
Chicago PI Services Group
“He listened to what we needed done, then determined how we could move forward.”
Scoutlogic Pre-Employment Background Screening
“Turn around time is consistent and reports are detailed.”
Why these companies made our list
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