Clearfield is a city in Davis County, Utah, United States. The population was 30,112 at the 2010 census. The city grew drastically during the 1940s, with the formation of Hill Air Force Base, and in the 1950s with the nationwide increase in suburb and "bedroom" community populations and has been steadily growing since then.Clearfield is a principal city of the Ogden–Clearfield, Utah Metropolitan Statistical Area, which includes all of Davis, Morgan, and Weber counties.