Below is a list of Oswego KS zip codes. For your research we have also included Oswego Area Code, Time Zone, UTC and the local Labette County FIPS Code. Each Oswego Kansas zip code has a center Longitude / Latitude point (the Oswego center is -95.10880279541 / 37.164901733398). For your convenience we have also indicated if that zip code in Oswego observes Daylight Savings time.