
Merseyside is a metropolitan county in North West England, with a population of 1,365,900. Taking its name from the River Mersey, the title "Merseyside" came into existence as a metropolitan county in 1974, after the passage of the Local Government Act 1972, and the county consists of five metropolitan boroughs adjoining the Mersey estuary, including the City of Liverpool.
Merseyside County Council was abolished in 1986, and so its districts (the metropolitan boroughs) are now effectively unitary authorities. However, the metropolitan county continues to exist in law and as a geographic frame of reference.[1][2][3]
Merseyside is divided into two parts by the Mersey estuary: the Wirral is located on the west side of the estuary upon the Wirral Peninsula; the rest of the county is located on the east side. The northern part of Merseyside borders onto Lancashire to the north, Greater Manchester to the east, both parts border Cheshire to the south.
The territory comprising the county of Merseyside previously formed the county boroughs of Birkenhead, Wallasey, Liverpool, Bootle, and St Helens and part of the administrative counties of Lancashire (north of the River Mersey) and Cheshire (south of the River Mersey).

