Richfield is a city in and the county seat of Sevier County, Utah, in the United States, and is the largest city in southern-central Utah. As of the 2010 census, the city population was 7,551. It lies in the Mormon Corridor, just off of Interstate 70 about 40 miles east of its junction with Interstate 15. The county can be best described as "rural diversified" due to the convergence of agricultural, retail and industrial activities. One of Richfield's regional roles is that it lies on the interstate freeway almost precisely halfway between Los Angeles and Denver.