Private Investigators in Illinois

Connect with licensed, vetted private investigators serving Illinois. Compare published fees, then request an investigator — no obligation and no on-the-spot quotes.

Looking for a private investigator in Illinois? El Paso Investigations is a private investigation broker — we match you with independent, licensed member agencies serving Illinois, so you can compare credentials and published fees before you commit.

Investigative services in Illinois

Surveillance

Background Check

Skip Trace / Locate

Process Serving

Asset Search

Infidelity / Domestic

Corporate / Fraud Investigation

Due Diligence

How it works

1. Tell us what you need

Describe your situation in Illinois and the kind of investigator you're looking for.

2. We match you

We refer your request to vetted, licensed member agencies serving Illinois.

3. Compare and choose

Review published fees and credentials, then work directly with the agency you choose.

Member agencies serving Illinois

We're onboarding licensed agencies in Illinois now. Submit a request and we'll match you as agencies come online — or, if you're an investigator, list your agency.

Private investigator licensing requirements vary by state. Every agency we refer is independently licensed where the law requires it. El Paso Investigations is a referral broker and does not itself provide investigative services.