Mount Rainier (disambiguation)

Mount Rainier may refer to
 * Mount Rainier, a stratovolcano southeast of Seattle, Washington
 * Mount Rainier National Park, which contains the volcano
 * Mount Rainier Wilderness, a designated wilderness area within Mount Rainier National Park
 * Mount Rainier Forest Reserve, a reserve now split between Mount Baker-Snoqualmie, Wenatchee and Gifford Pinchot National Forests
 * Mount Rainier Scenic Railroad, a railroad near the volcano
 * Mount Rainier Volcano Lahar Warning System, an emergency system designed to assist evacuation in case of an eruption
 * Mount Rainier (train), a former Amtrak train
 * Mount Rainier, Maryland, a town in the United States
 * Mount Rainier Historic District, a historic district located in Mount Rainier, Maryland
 * 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