Greenock was a burgh constituency represented in the House of Commons of the Parliament of the United Kingdom from 1832 until 1974, when it was abolished and its area was merged into the new Greenock and Port Glasgow constituency.

Alexander Colquhoun-Stirling-Murray-Dunlop was a Scottish church advocate and Liberal Party politician. He was the Member of Parliament (MP) for Greenock from 1852 to 1868. He was a very influential figure in the Disruption of 1843 which led to the formation of the Free Church of Scotland. For that denomination he drafted the Church-State papers: the Claim of Right and the Protest. He became known by the nickname the Member for Scotland.