Catherine Thomas (born in 1963[1]) is a Welsh politician and former Labour Welsh Assembly Member for the constituency of Llanelli.

She narrowly beat Helen Mary Jones of Plaid Cymru at the 2003 Assembly election with a majority of 21.

[2] Helen Mary Jones defeated her in the 2007 election.

[1] Aide to Julie Morgan MP, 1997–2003.

[1] Welsh Assembly Member for the constituency of Llanelli 2003–07.