The Kilmarnock Burghs by-election was a Parliamentary by-election held on 26 September 1911. It returned one Member of Parliament (MP) to the House of Commons of the United Kingdom, elected by the first past the post voting system. The constituency consisted of five parliamentary burghs: Kilmarnock in the county of Ayr, Dumbarton in the county of Dumbarton, Rutherglen in the county of Lanark and Renfrew and Port Glasgow in the county of Renfrew.

Kilmarnock Burghs was a district of burghs constituency of the House of Commons of the Parliament of the United Kingdom from 1832 to 1918. It elected one Member of Parliament (MP) by the first-past-the-post voting system.