Mount Rainier is a stratovolcano southeast of Seattle, Washington.

Mount Rainier may also refer to:

Mount Rainier (train), a former Amtrak train Mount Rainier, Maryland, a town in the United States Mount Rainier High School, a school in Des Moines, Washington Mount Rainier (packet writing), a technology for reading and writing CD-RWs, similar to the Universal Disk Format

See also Mount Rainier National Park Mount Rainier Forest Reserve Rainier (disambiguation)