Greenock
The coast of Greenock formed a broad bay with three smaller indentations: the Bay of Quick was known as a safe anchorage as far back as 1164. To its east, a sandy bay ran eastwards from the Old Kirk and the West Burn as far as Wester Greenock castle. The fishing village of Greenock developed along this bay, and around 1635 Sir John Schaw had a jetty built into the bay which became known as Sir John's Bay. In that year he obtained a Charter raising Greenock to a Burgh of Barony with rights to a weekly market. Further east, Saint Laurence Bay curved round past the Crawfurd Barony of Easter Greenock to Garvel (or Gravel) Point. When a pier (or dyke) was built making the bay an important harbour, the fishing village of Cartsburn gained the alternative name of Crawfurdsdyke. In 1642 it was made into the Burgh of Barony of Crawfurdsdyke, and part of the ill-fated Darien Scheme set out from this pier in 1697. This town was later renamed Cartsdyke.
Greenock and Port Glasgow (UK Parliament constituency)
In 1975, under the Local Government (Scotland) Act 1973, counties and burghs throughout Scotland had been abolished in favour of regions and districts and islands council areas. Therefore, in 1975, the constituency of Greenock and Port Glasgow had become effectively a constituency within the Inverclyde district of the Strathclyde region. For the 1983 general election new constituency boundaries were drawn, taking account of new local government boundaries.