Below is a list of Smithville MO zip codes. For your research we have also included Smithville Area Code, Time Zone, UTC and the local Clay County FIPS Code. Each Smithville Missouri zip code has a center Longitude / Latitude point (the Smithville center is -94.583999633789 / 39.381000518799). For your convenience we have also indicated if that zip code in Smithville observes Daylight Savings time.