Lewiston is a city in Cache County, Utah, United States. It is situated at the northern Utah border and borders the state of Idaho. The population was 1,766 at the 2010 census. It is included in the Logan, Utah-Idaho (partial) Metropolitan Statistical Area.

Cache County is a county located in the Wasatch Front region of Utah. As of the 2020 United States Census, the population was 133,154, with an estimated 140,173 in 2022. Its county seat and largest city is Logan. Cache County is one of two counties included in the Logan metropolitan area, alongside Franklin County, Idaho.