1968 Caerphilly by-election

Candidates

• Labour chose Alfred Evans to defend their seat, who was a councillor.
• Nationalist party Plaid Cymru stood Philip Williams, who at the time was teaching at University College, Aberystwyth and was mentored by John DA Howell.
• The Conservatives chose Robert Williams.
• Peter Sadler was the choice of the Liberal Party association.

  Result of the previous general election

Result of the by-election