Davis County is a county located in the U.S. state of Utah. In land area it is the smallest county in Utah. In 2000 the population was 238,994 and by 2008 was estimated at 295,332. It was named for Daniel C. Davis, captain in the Mormon Battalion. The county is part of the Ogden–Clearfield Metropolitan Statistical Area as well as the Salt Lake City–Ogden–Clearfield Combined Statistical Area. Its county seat is Farmington and its largest city is Layton.

Davis County also contains the Lagoon Amusement Park in Farmington, the main amusement park serving the Wasatch Front.

Davis County was created on October 5, 1850, with Farmington designated as its county seat, because of its geographic location midway between boundaries at the Weber River on the north and the Jordan River on the south. During its first 50 years, Davis County grew slowly. With the advent of the Utah Central Rail Road in 1870, a transition to mechanized agriculture and a surge of commerce, banking, improved roads, new water systems, and electrification of homes began. However, by 1940, the population was barely 16,000.

With the establishment of Hill Air Force Base in northern Davis County, there was a surge of civilian employment after World War II. The county doubled in population between 1940 and 1950, and doubled again between 1950 and 1960 as part of the nationwide suburb boom that was occurring at the time. By 1990 there were 188,000 residents, and in 2000, there were 239,000. By 2030, the county is expected to have a population of about 360,000.

Today, most of the population resides in Layton, Bountiful, Kaysville, and Clearfield while most of the growth is concentrated in the northwest, northeast, and southwest portions of the county, and especially in such cities as Syracuse, Clinton, West Point, South Weber, and Woods Cross. - From Wikipedia, the free encyclopedia.