A basic police scanner will work for most police, fire and ambulance operations in Cook County, Illinois, including: Evanston, Oak Park, Orland Park, Cicero, Skokie, Des Plaines, Oak Lawn, Berwyn, Tinley Park, Glenview, Calumet City, Park Ridge, Wheeling, Northbrook, Chicago Heights, Niles, Harvey, Lansing, Oak Forest, Burbank, Wilmette, Winnetka and Maywood.
The best police scanner for some agencies using Northwest Central Dispatch, including Arlington Heights, Mount Prospect, Buffalo Grove, Elk Grove, Prospect Heights and Palatine is a digital trunking police scanner.
The best police scanner for some agencies that use analog trunked systems, including Schaumburg, Hoffman Estates and Streamwood is a trunktracking police scanner.
Chicago Police, Fire and Ambulance services can be heard with basic scanners.
The Cook County Sheriff uses a digital trunked system that is partially encrypted, the best police scanner is a digital trunktracking scanner.
To monitor the Illinois State Police and other state agencies a digital trunking scanner radio is needed as they operate on the StarCom21 APCO25 digital trunked system.
To view more information on this county please see the following links:
Cook County Operations (CARMA)
Chicago City Operations (CARMA)
Suburban Cook County towns (CARMA)