Other
- Rainier (Link station), a light rail station in Seattle
- Rainier Brewing Company, based in Washington, United States
- Buick Rainier, a mid-sized sport utility vehicle from General Motors
- Rainier cherry, a cultivar of cherry
- Rainier Club, a private club in Seattle, Washington
- Rainier Wolfcastle, a recurring character on The Simpsons
- Rainier High School (disambiguation), one of several high schools in the United States
- Rainier Motor Car Company
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