Below is a list of Markham IL zip codes. For your research we have also included Markham Area Code, Time Zone, UTC and the local Cook County FIPS Code. Each Markham Illinois zip code has a center Longitude / Latitude point (the Markham center is -87.69580078125 / 41.600799560547). For your convenience we have also indicated if that zip code in Markham observes Daylight Savings time.