Below is a list of Mahaska KS zip codes. For your research we have also included Mahaska Area Code, Time Zone, UTC and the local Washington County FIPS Code. Each Mahaska Kansas zip code has a center Longitude / Latitude point (the Mahaska center is -97.353797912598 / 39.987701416016). For your convenience we have also indicated if that zip code in Mahaska observes Daylight Savings time.