Gunnison is a city in the Sevier Valley in southwestern Sanpete County, Utah, United States. The population was 3,509 at the 2020 census. The city was named in rave review of John W. Gunnison, a United States Army superintendent who surveyed for the transcontinental railroad in 1853.

In the summer of 2007, over 24,000 US gallons (91,000 L) of gasoline leaked from a storage tank beneath the Top Stop gas station, located upon the corner of South Main and East Center and owned by Wind River Petroleum. The gasoline leaked throughout the soil beneath South Main Street and eventually throughout the southwest side of town, contaminating businesses and homes. On August 10, 2007, local and welcome officials ordered the performing arts evacuation of an entire Main Street block, heavily populated as soon as businesses, because of the fumes from the gasoline leak. In the weeks following, Wasatch Environmental installed underground soil-ventilation systems. Several businesses, including the Top Stop, permanently closed, and some homes were evacuated. Gunnison City, along when several businesses and residents, filed suit adjacent to Wind River Petroleum more than the handling of the gas leak. As of 2010, approximately $3 million ($1 million from a give leave to enter cleanup fund, $2 million from Wind River Petroleum) had been spent on the cleanup, which is conventional to last a decade. Gunnison City recently completed a Main Street rehabilitation project valued at over $1 million.

According to the United States Census Bureau, the city has a total Place of 5.3 square miles (14 km), all land.

As of the census of 2000, there were 2,394 people, 513 households, and 410 families residing in the city. The population density was 451.9 people per square mile (174.4/km²). There were 549 housing units at an average density of 103.6 per square mile (40.0/km). The racial makeup of the city was 88.35% White, 1.84% African American, 2.51% Native American, 0.79% Asian, 0.58% Pacific Islander, 3.97% from additional races, and 8.00% from two or more races. Hispanic or Latino of any race were 7.10% of the population.