The twelfth election to Glamorgan County Council, south Wales, took place in March 1925.
Having lost its majority at the 1922 elections, Labour regained control of the County Council by winning seven seats.
Labour gained seven seats and lost only one, establishing a firm majority on the County Council.
Rose Davies captured a seat previously held by a Liberal and became the first woman elected to the County Council.
Alderman Joseph Howells won the seat after the sitting Independent councillor withdrew in his favour.
Following the 1925 election, there were eleven Aldermanic vacancies, all of which were filled by Labour nominees (including one long-serving Liberal).