Chester is a cathedral city and the county town of Cheshire, England, on the River Dee, close to the England-Wales border. With a built-up are…Chester is a cathedral city and the county town of Cheshire, England, on the River Dee, close to the England-Wales border. With a built-up area population of 92,760 in 2021, it is the most populous settlement of Cheshire West and Chester. It is also the historic county town of Cheshire and the second-largest settlement in Cheshire after Warrington.