Layton (/ˈleɪʔɪn/) is a city in Davis County, Utah, United States. It is part of the Ogden-Clearfield Metropolitan Statistical Area. As of the 2020 census, the city had a population of 81,773, with 2022 Census Bureau estimates showing an increase to 82,601. 2024 estimates place Layton's population at 87,392. Layton is the most populous city in Davis County and the ninth most populous in Utah.

Davis County is a county in northern Utah, United States. As of the 2020 United States Census, the population was 362,679, making it Utah's third-most populous county. Its county seat is Farmington, and its largest city by both population and area is Layton.