Below is a list of Whitman County WA zip codes. For your research we have also included Whitman County Area Code, Time Zone, UTC and the local County FIPS Code. Each Whitman County Washington zip code has a center Longitude / Latitude point (the Whitman County center is -117.37300109863 / 46.936298370361). For your convenience we have also indicated if that zip code in Whitman County observes Daylight Savings time.