The City of Colchester is a local government district with city status in Essex, England, named after its main settlement, Colchester. It is, with 194,394 people according to Office of National Statistics estimate for mid 2022, the most populous district in the Essex and also includes the towns of West Mersea and Wivenhoe and the surrounding rural areas stretching from Dedham Vale on the Suffolk border in the north to Mersea Island in the Colne Estuary in the south.