Alpine is a city on the northeastern edge of Utah County, Utah, United States. The population was 10,251 at the time of the 2020 census. Al…Alpine is a city on the northeastern edge of Utah County, Utah, United States. The population was 10,251 at the time of the 2020 census. Alpine has been one of the many quickly-growing cities of Utah since the 1970s, especially in the 1990s. This city is thirty-two miles southeast of Salt Lake City. It is located on the slopes of the Wasatch Range north of Highland and American Fork. The west side of the city runs above the Wasatch Fault.