Ellesmere Port () is a port town in the Cheshire West and Chester local authority area of Cheshire, England. Ellesmere Port is on the south eastern edge of the Wirral Peninsula, 6 miles (9.7 km) north of Chester, 12 miles (19 km) south of Birkenhead, 16 miles (26 km) southwest of Runcorn and 11 miles (18 km) south of Liverpool. The town had a population of 61,090 in the 2011 census. Ellesmere Port also forms part of the wider Birkenhead urban area, which had a population of 325,264 in 2011.
The town was originally established on the River Mersey at the entrance to the Ellesmere Canal. As well as a service sector economy, it has retained large industries including Stanlow oil refinery, a chemical works and the Vauxhall Motors car factory. There are also a number of tourist attractions including the National Waterways Museum, the Blue Planet Aquarium and Cheshire Oaks Designer Outlet.