Below is a list of Cowlitz County WA zip codes. For your research we have also included Cowlitz County Area Code, Time Zone, UTC and the local County FIPS Code. Each Cowlitz County Washington zip code has a center Longitude / Latitude point (the Cowlitz County center is -122.76399993896 / 46.150100708008). For your convenience we have also indicated if that zip code in Cowlitz County observes Daylight Savings time.