Below is a list of Oskaloosa KS zip codes. For your research we have also included Oskaloosa Area Code, Time Zone, UTC and the local Jefferson County FIPS Code. Each Oskaloosa Kansas zip code has a center Longitude / Latitude point (the Oskaloosa center is -95.310699462891 / 39.21549987793). For your convenience we have also indicated if that zip code in Oskaloosa observes Daylight Savings time.