<page_title> Carmarthen (UK Parliament constituency) </page_title> <section_title> 1918–1997: county constituency </section_title> <table> <cell> 1966 by-election <col_header> Election </col_header> </cell> <cell> Gwynfor Evans <col_header> Member </col_header> </cell> <cell> Plaid Cymru <col_header> Party </col_header> </cell> </table>
The constituency of Carmarthen elected Plaid Cymru MP, Gwynfor Evans, at a 1966 by-election.