Fairfield is a town in Utah County, Utah, United States. It is part of the Provo–Orem, Utah Metropolitan Statistical Area. It is located in the southwest corner of Cedar Valley about 50 miles (80 km) southwest of Salt Lake City and 5 miles (8.0 km) south of Cedar Fort on Utah State Route 73, west of Utah Lake. The population was 119 at the 2010 census.

The Provo–Orem, UT Metropolitan Statistical Area, as defined by the United States Office of Management and Budget, is an area consisting of two counties in Utah, anchored by the cities of Provo and Orem. As of the 2020 census, the MSA had a population of 671,185.