Below is a list of Hennepin OK zip codes. For your research we have also included Hennepin Area Code, Time Zone, UTC and the local Carter County FIPS Code. Each Hennepin Oklahoma zip code has a center Longitude / Latitude point (the Hennepin center is -97.346000671387 / 34.509201049805). For your convenience we have also indicated if that zip code in Hennepin observes Daylight Savings time.