There have been several elective constituencies called Ayrshire:
Ayrshire (Parliament of Scotland constituency); 1605–1707 Ayrshire (UK Parliament constituency); 1708–1868 South Ayrshire (UK Parliament constituency); 1868–1983 North Ayrshire (UK Parliament constituency); 1868–1918 Bute and Northern Ayrshire (UK Parliament constituency); 1918–1983 Central Ayrshire (UK Parliament constituency); 1950-1983 and since 2005 North Ayrshire and Arran (UK Parliament constituency); since 2005
See also Ayr (constituency) Ayrshire (disambiguation)