Below is a list of Koshkonong MO zip codes. For your research we have also included Koshkonong Area Code, Time Zone, UTC and the local Oregon County FIPS Code. Each Koshkonong Missouri zip code has a center Longitude / Latitude point (the Koshkonong center is -91.644599914551 / 36.594799041748). For your convenience we have also indicated if that zip code in Koshkonong observes Daylight Savings time.