Many Finnish homesteaders settled in the area at the turn of the century. They had been coal miners in the Belt area but were lured to Geyser by free land offers. In earlier days, it was a stagecoach stopping place on the trail from Great Falls to Lewistown. In 1920, Geyser became a rail line station, when the old town was moved to its existing site. The first post office was established in 1892 with Mary McCarthy as postmaster.
Geyser is located in central Montana, between Great Falls and Lewistown on U.S. Highway 87.