Below is a list of Benton County IA zip codes. For your research we have also included Benton County Area Code, Time Zone, UTC and the local County FIPS Code. Each Benton County Iowa zip code has a center Longitude / Latitude point (the Benton County center is -92.036499023438 / 42.021800994873). For your convenience we have also indicated if that zip code in Benton County observes Daylight Savings time.