Carmarthen (Welsh: Caerfyrddin) was the name of a parliamentary constituency in Wales which returned one Member of Parliament (MP) to the House of Commons of the Parliament of the United Kingdom between 1542 and 1997. It was named Carmarthen Boroughs from 1832 to 1918.At its abolition in 1997 it was replaced, partly by the new Carmarthen East and Dinefwr constituency and partly by Carmarthen West and South Pembrokeshire.