Below is a list of Knoxville AR zip codes. For your research we have also included Knoxville Area Code, Time Zone, UTC and the local Johnson County FIPS Code. Each Knoxville Arkansas zip code has a center Longitude / Latitude point (the Knoxville center is -93.3646 / 35.3698). For your convenience we have also indicated if that zip code in Knoxville observes Daylight Savings time. For more information on Knoxville Arkansas you will find helpful business links and searches.