Liverpool (pronounced /ˈlɪvɚpuːl/) is a city and metropolitan borough of Merseyside, England, along the eastern side of the Mersey Estuary. It was founded as a borough in 1207 and was granted city status in 1880. Liverpool is the fourth largest city in the United Kingdom and has a population of 435,500, and lies at the centre of the wider Liverpool Urban Area, which has a population of 816,216.

Historically a part of Lancashire, the urbanisation and expansion of Liverpool were largely brought about by the city's status as a major port. By the 18th century, trade from the West Indies, Ireland and mainland Europe coupled with close links with the Atlantic Slave Trade furthered the economic expansion of Liverpool. By the early 19th century, 40% of the world's trade passed through Liverpool's docks, contributing to Liverpool's rise as a major city.

Inhabitants of Liverpool are referred to as Liverpudlians but are also known as "Scousers", in reference to the local dish known as "scouse", a form of stew. The word "Scouse" has also become synonymous with the Liverpool accent and dialect. Liverpool's status as a port city has contributed to its diverse population, which, historically, were drawn from a wide range of peoples, cultures, and religions, particularly those from Ireland. The city is also home to the oldest Black African community in the country and the oldest Chinese community in Europe.

The popularity of The Beatles and the other groups from the Merseybeat era contributes to Liverpool's status as a tourist destination; tourism forms a significant part of the city's modern economy. In 2007 the city celebrated its 800th anniversary, and in 2008 it held the European Capital of Culture title together with Stavanger, Norway.

In 2004, several areas throughout the city centre were granted World Heritage Site status by UNESCO. Referred to as the Liverpool Maritime Mercantile City, the site comprises six separate locations in the city including the Pier Head, Albert Dock and William Brown Street and includes many of the city's most famous landmarks.