The number of breeding Ring-billed Gulls (Larus delawarensis) has been rapidly growing in at least one region of their broad range, that of the Great Lakes (Ludwig 1974). Several factors have been proposed to account for this increase, including greater availability of nesting sites, introductions of exotic fish, increased utilization of insects by the gulls and decreased human predation (Ludwig 1974, Jarvis and Southern 1976). In this report we examine the status of the Ring-billed Gull in the State of Washington, comparing current and past records of breeding colonies in the state. We also provide similar information on the California Gull (L. californicus) which often occupies colony sites with the Ring-billed Gull.