Below is a list of Harrisburg AR zip codes. For your research we have also included Harrisburg Area Code, Time Zone, UTC and the local Poinsett County FIPS Code. Each Harrisburg Arkansas zip code has a center Longitude / Latitude point (the Harrisburg center is -90.724403381348 / 35.56010055542). For your convenience we have also indicated if that zip code in Harrisburg observes Daylight Savings time.