Below are a list of the cities located in Johnson County, IA. There are 14 total unique zip codes in Johnson County, Iowa. The time zone for Johnson 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 19103.
The population in Johnson County, IA is currently 154,748. That is an increase of 18.46% vs the population of 130,882 in 2010.
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