Wirral or the Wirral ˈ is a peninsula

Peninsula

A peninsula is a piece of land that is bordered by water on three sides but connected to mainland. In many Germanic and Celtic languages and also in Baltic, Slavic and Hungarian, peninsulas are called "half-islands"....

 in North West England

North West England

North West England, informally known as The North West, is one of the nine official regions of England.North West England had a 2006 estimated population of 6,853,201 the third most populated region after London and the South East...

. It is bounded by three bodies of water: to the west by the River Dee

River Dee, Wales

The River Dee is a long river in the United Kingdom. It travels through Wales and England and also forms part of the border between the two countries....

, forming a boundary with Wales, to the east by the River Mersey

River Mersey

The River Mersey is a river in North West England. It is around long, stretching from Stockport, Greater Manchester, and ending at Liverpool Bay, Merseyside. For centuries, it formed part of the ancient county divide between Lancashire and Cheshire....

 and to the north by the Irish Sea

Irish Sea

The Irish Sea separates the islands of Ireland and Great Britain. It is connected to the Celtic Sea in the south by St George's Channel, and to the Atlantic Ocean in the north by the North Channel. Anglesey is the largest island within the Irish Sea, followed by the Isle of Man...

. Both terms "Wirral" and "the Wirral" are used locally (and interchangeably), although the merits of each form are the subject of local debate. People from the Wirral are called Wirralians, which is also the name of a local rugby

Rugby football

Rugby football is a style of football named after Rugby School in the United Kingdom. It is seen most prominently in two current sports, rugby league and rugby union.-History:...

 club.

The roughly rectangular peninsula is about 10 miles (16.1 km) long and 7 miles (11.3 km) wide.