Kilmarnock was a county constituency of the House of Commons of the Parliament of the United Kingdom from 1918 to 1983.
The constituency included the area of the former parliamentary burgh of Kilmarnock.
Prominent Members for this seat included long-serving Scottish Secretary Willie Ross, and senior judge Craigie Mason Aitchison.
The Kilmarnock constituency consisted of "The county district of Kilmarnock, inclusive of all burghs situated therein except insofar as included in the Ayr District of Burghs."
The counties of Ayr and Bute had been covered, previously, by the five constituencies of Ayr Burghs, Buteshire, Kilmarnock Burghs, North Ayrshire and South Ayrshire.