UK Parliamentary by-election
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. It was the last of only eight ministerial by-elections in the UK not to be retained by the incumbent. 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.
! scope="col" colspan="2" style="width: 130px"|Party
! scope="col" style="width: 17em"|Candidate
! scope="col" style="width: 5em"|Votes
! scope="col" style="width: 3.5em"|%
! scope="col" style="width: 3.5em"| ;templatestyles src="Template:Tooltip/styles.css" / ;±%
! colspan="3" style="text-align: right; margin-right: 0.5em" | Majority
! colspan="3" style="text-align: right; margin-right: 0.5em" scope=row | Turnout
! colspan="3" style="text-align:right;" scope=row | Registered electors
! style="text-align:right;" | Swing
References.
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