Below is a list of Washita OK zip codes. For your research we have also included Washita Area Code, Time Zone, UTC and the local Caddo County FIPS Code. Each Washita Oklahoma zip code has a center Longitude / Latitude point (the Washita center is -98.340301513672 / 35.102699279785). For your convenience we have also indicated if that zip code in Washita observes Daylight Savings time.