Below is a list of Richland WA zip codes. For your research we have also included Richland Area Code, Time Zone, UTC and the local Benton County FIPS Code. Each Richland Washington zip code has a center Longitude / Latitude point (the Richland center is -119.297 / 46.2849). For your convenience we have also indicated if that zip code in Richland observes Daylight Savings time. For more information on Richland Washington you will find helpful business links and searches.