Below is a list of Smithville OK zip codes. For your research we have also included Smithville Area Code, Time Zone, UTC and the local Mccurtain County FIPS Code. Each Smithville Oklahoma zip code has a center Longitude / Latitude point (the Smithville center is -94.646301269531 / 34.466999053955). For your convenience we have also indicated if that zip code in Smithville observes Daylight Savings time.