Directory – Private Investigators and Private Detectives in Illinois

Illinois Private Investigators
& Detective Agencies

Illinois PI Licensing Requirements



Northern Illinois FKS Investigations is the premier Private Detective Agency in Northern Illinois. We specialize in all Private, Legal & Business Investigations.

Chicago Courthouse Courier, We are a full service Private Detective and Private Process Serving firm with locations from Chicago to Springfield Illinois. If you have any questions please call 877-528-5997 or email Kyle

Glen Carbon Kellerman Investigations, Ltd. Southern Illinois Process Serving, License: 115-001758, 21 Kingsley Way, Glen Carbon, IL. 62034, 888-402-6662, 618-410-3943 cell,

Chicago Ultimate Security and Investigations of America, a full service investigative and private detective company serving the Chicago metro area. We specialize in a broad scope of investigative and security services along with security training, which includes classroom instruction and practical exercises.

Elgin We are a veteran-owned fully licensed and insured Illinois private detective agency located in Elgin, IL providing a wide range of investigative services and the service of process throughout Illinois. We specialize in domestic, civil, workers comp, personal injury, surveillance, fraud, background and skip tracing/Locate investigations and the service of process.


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