Below is a list of Northbrook IL zip codes. For your research we have also included Northbrook Area Code, Time Zone, UTC and the local Cook County FIPS Code. Each Northbrook Illinois zip code has a center Longitude / Latitude point (the Northbrook center is -87.838897705078 / 42.12739944458). For your convenience we have also indicated if that zip code in Northbrook observes Daylight Savings time.