Below are a list of the cities located in Cook County, IL. There are 215 total unique zip codes in Cook County, Illinois. The time zone for Cook County is the Central Daylight Time zone and they follow daylight savings time. The Federal Information Processing System (FIPS) Code for echo $county.' County, '.$state_abbrev ?> is 17031.
The population in Cook County, IL is currently 5,173,146. That is a decrease of 0.00% vs the population of 5,194,675 in 2010.
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