Below is a list of Vassar KS zip codes. For your research we have also included Vassar Area Code, Time Zone, UTC and the local Osage County FIPS Code. Each Vassar Kansas zip code has a center Longitude / Latitude point (the Vassar center is -95.619697570801 / 38.637401580811). For your convenience we have also indicated if that zip code in Vassar observes Daylight Savings time.