Below is a list of Osage County OK zip codes. For your research we have also included Osage County Area Code, Time Zone, UTC and the local County FIPS Code. Each Osage County Oklahoma zip code has a center Longitude / Latitude point (the Osage County center is -96.392799377441 / 36.555400848389). For your convenience we have also indicated if that zip code in Osage County observes Daylight Savings time.