Listen to Chicago Area State Police & SOS Police

Chicago Area State Police & SOS Police is a Public Safety scanner feed covering Cook County, Illinois. Expect a mix of dispatch traffic as calls come in, along with units reporting their status.

Yes. Listening to Chicago Area State Police & SOS Police in the Scanner Radio app is free on both iPhone and Android.

Scanner Radio lists 80 other scanners in Cook County, Illinois, including Alsip Fire, Arlington Heights / Palatine / Mount Prospect Police & Fire and Berkeley Fire. You can see all scanners in Cook County on the area page.

Scanner traffic comes in bursts, so a silent stretch usually just means a quiet moment on the channel. If the feed itself is down, it is usually for maintenance and typically comes back on its own.

In Scanner Radio, turn on push notifications to hear when listener numbers on a feed suddenly spike, which is often the first sign of a major incident, or when there is a big breaking news story.

Dispatchers use 10-codes, signal codes and unit numbers as shorthand. Scanner Radio includes a built-in 10-code reference so you can follow along. Police Scanner Codes Explained: The Complete 10-Code Guide.

Yes. How to Listen to Police Scanners in Chicago walks through the main scanner feeds for the area and how to listen to them.