Below is a list of Silverlake WA zip codes. For your research we have also included Silverlake Area Code, Time Zone, UTC and the local Cowlitz County FIPS Code. Each Silverlake Washington zip code has a center Longitude / Latitude point (the Silverlake center is -122.85500335693 / 46.293598175049). For your convenience we have also indicated if that zip code in Silverlake observes Daylight Savings time.