Below is a list of Clarksville IA zip codes. For your research we have also included Clarksville Area Code, Time Zone, UTC and the local Butler County FIPS Code. Each Clarksville Iowa zip code has a center Longitude / Latitude point (the Clarksville center is -92.66780090332 / 42.784698486328). For your convenience we have also indicated if that zip code in Clarksville observes Daylight Savings time.