Brighton is a city in Livingston County in the U.S. state of Michigan. As of the 2020 census, the city population was 7,446. Brighton forms part o…Brighton is a city in Livingston County in the U.S. state of Michigan. As of the 2020 census, the city population was 7,446. Brighton forms part of the South Lyon-Howell-Brighton Urban Area. It is one of two incorporated cities in Livingston County and incorporates land that was part of Brighton, Green Oak, and Genoa townships.