Welcome to Stateline Investigations Inc., the premier private detective agency in Northern Illinois. 

We specialize in all Private, Legal & Business Investigations. Stateline Investigations Inc. is committed to providing you with the most accurate information in a timely and cost effective manner. Prior to accepting your case, one of our investigators will provide you with an honest assessment your circumstances. The assessment will include the probability of success and the anticipated cost associated with your solution.

Contact us today for your free consultation. Stateline Investigations Inc. is a locally owned and operated private detective agency. We guarantee professional service with a personal touch.

What to Look for in a Private Investigator

Hiring a Private Investigator should be an intimate process – not a stressful one. Often times, cases require the knowledge of sensitive, private, and secret information involving you, your family, and your friends. Many states only require a person to pass an examination to title themselves a "Licensed Private Investigator." We all know, however, that a certificate on the wall does not warrant a person to be an experienced investigator. In order to ensure that you are hiring the right person, you must ask the necessary questions:

* Are they licensed?

* Do they have any investigative experience?

* Are they current/retired law enforcement or government?

* How can you be sure that your information is going to be kept private and confidential?

* Is the private investigator or company ethical?

* Is the private investigator or company knowledgeable about the law?


Stateline Investigations Inc. is excited to announce that we are in the process of becoming an approved Live Scan vendor for the State of Illinois. With this service we can offer a corporate solution like no other. Stateline Investigations Inc. will be one of a select few companies in Northern Illinois, who have the ability to transmit fingerprints to the Illinois State Police and the Federal Bureau of Investigations.

See our Live Scan page for details

"Fast, efficient, dependable, and professional. I was extremely impressed with all aspects of their work and their communications along the way. I would say they are the best of the best in the Chicago area."

Steve D.

Our Coverage Area

  • Boone County, IL

  • Cook County, IL

  • DuPage County, IL

  • Kane County, IL

  • Lake County, IL

  • McHenry County, IL

  • Will County, IL

  • Winnebago County, IL

Contact Information

Stateline Investigations Inc.
518 S Route 31, Suite 120
McHenry, IL 60050

Illinois License #115-002446


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