Greenock and Port Glasgow was a burgh constituency of the House of Commons of the Parliament of the United Kingdom from 1974 until 1997, electing one Member of Parliament (MP) by the first past the post system of election.
As first used, in the February 1974 general election, the constituency had been defined by the Second Periodical Review of the Boundary Commission to cover the burghs of Greenock and Port Glasgow in the county of Renfrew.
[1] Prior to the February 1974 election, the county had been covered by East Renfrewshire, West Renfrewshire, Greenock, and Paisley, with the Greenock constituency covering the burgh of Greenock, and the burgh of Port Glasgow within the West Renfrewshire 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.
In 1996, under the Local Government etc (Scotland) Act 1994, the Inverclyde district became a unitary council area For the 1997 general election, the Greenock and Port Glasgow constituency was divided between the Greenock and Inverclyde and Renfrewshire West constituencies.