where is rainier washington
Rainier, WA. Online Offers. Rainier is a city in Thurston County, Washington, United States. Beginning as a train stop in the 1870s, Rainier was first settled in 1890, and was officially incorporated in 1947. The population was 1,794 at the 2010 U.S. Census. Rainier began in the 1870s as a stop on the Northern Pacific Railroad line between Kalama, Washington and Tacoma.