County Hall (Welsh: Neuadd y Sir Caerfyrddin) is a municipal facility on Castle Hill in Carmarthen, Wales.

The county council initially met in Llandovery and then moved to Bank House on Spilman Street in Carmarthen in 1907.

[2] The Earl of Wessex visited County Hall on 17 October 2002 in his capacity as a trustee of The Duke of Edinburgh's Award.

[9] In August 2018 a six-metre statue sculpture of a bike designed by "Wild Creations" was erected at the south west corner of building as part of the preparations for the Tour of Britain the route of which went past County Hall on the way from Pembrey Country Park to Llandovery.

[10] Works of art in the building include a painting by the Welsh artist, Evan Walters, depicting Eve in the Garden of Eden.