Below is a list of Washington AR zip codes. For your research we have also included Washington Area Code, Time Zone, UTC and the local Hempstead County FIPS Code. Each Washington Arkansas zip code has a center Longitude / Latitude point (the Washington center is -93.6681 / 33.7508). For your convenience we have also indicated if that zip code in Washington observes Daylight Savings time. For more information on Washington Arkansas you will find helpful business links and searches.