Prior to its uniform adoption of proportional representation in 1999, the United Kingdom used first-past-the-post for the European elections in England, Scotland and Wales. The European Parliament constituencies used under that system were smaller than the later regional constituencies and only had one Member of the European Parliament each. The constituency of Strathclyde West was one of them.

1979-1984: Bute and North Ayrshire, Central Dunbartonshire, East Dunbartonshire, East Renfrewshire, Greenock and Port Glasgow, Paisley, West Dunbartonshire, West Renfrewshire.

1984-1999: Clydebank and Milngavie, Cunninghame North, Dumbarton, Eastwood, Greenock and Port Glasgow, Paisley North, Paisley South, Renfrew West and Inverclyde, Strathkelvin and Bearsden.