Lewis National Liberal Mardy Jones Labour The 1922 Pontypridd by-election was held on 25 July 1922.

The by-election was held due to the appointment of the incumbent Coalition Liberal MP, Thomas Arthur Lewis, as a Junior Lord of the Treasury.

It was won by the Labour candidate Thomas Isaac Mardy Jones.

The requirement for MPs who were appointed as ministers to seek re-election was entirely abolished by the Re-Election of Ministers Act (1919) Amendment Act 1926.

This article about a by-election to the Parliament of the United Kingdom in Wales is a stub.