Blackpool is a seaside resort on the Lancashire coast in North West England. The town is on the Irish Sea, between the Ribble and Wyre estuaries, 15 miles (24 km) northwest of Preston, 27 miles (43 km) north of Liverpool, 28 miles (45 km) northwest of Bolton and 40 miles (64 km) northwest of Manchester. It had an estimated population of 139,720 at the 2011 Census, making it the most populous town in Lancashire.