| Carmarthenshire | |
|---|---|
| Former county constituency for the House of Commons | |
| 1542–1885 | |
| Seats | one until 1832, then two |
| Replaced by | East Carmarthenshire and West Carmarthenshire |
Carmarthenshire was a parliamentary constituency in Wales which returned one Member of Parliament (MP) to the House of Commons of the Parliament of the United Kingdom until its representation was increased to two members for the 1832 general election.
At the 1885 general election, it was divided into two new single-member seats: East Carmarthenshire and West Carmarthenshire.