The twelfth election to Glamorgan County Council, south Wales, took place in March 1925. It was preceded by the 1922 election and followed by the 1928 election.
Having lost its majority at the 1922 elections, Labour regained control of the County Council by winning seven seats.
There were no boundary changes at this election.
16 councillors were returned unopposed.
Of the eleven retiring aldermen, nine sought re-election. Seven of their number were returned unopposed; these included the chairman of the County Council, Daniel Daniels (Lib, Dulais Valley) after the sitting Labour councillor stood down in his favour.
The pattern of contests was similar to 1922, although Labour contested some seats that it had not previously stood.
Three retiring aldermen faced opposition. Rev D.H. Williams (Lib, Barry) faced a Labour opponent and the seat had been held by Labour since a 1919 by-election. W.H. Davies (Lab, Gower) faced an Independent opponent and in Caerphilly the sitting Independent stood down in favour of Joseph Howells though he faced a Labour challenge.
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 D.H. Williams, chair of the Central Welsh Board of Education, comfortably won the seat but this was technically a Liberal gain from Labour who had held the seat since a by-election after Williams was re-elected as alderman in 1919.
Alderman Joseph Howells won the seat after the sitting Independent councillor withdrew in his favour.
W.T. Jenkins had previously stood as an Independent but now declared himself a Labour supporter.
Alderman Daniel Daniels of Crynant, chairman of the County Council, was returned unopposed after the sitting Labour councillor did not contest the seat. This was technically a Liberal gain.
Henry Lewis again returned after many years.
James Evans, grocer, elected following Richard Lewis's election as alderman in 1901, was returned unopposed.
The sitting member had been elected as a Liberal in 1922.
The sitting member had been elected as a Liberal in 1922.
Enoch Davies, returned in 1901 following William Morgan's re-election as alderman, was elected unopposed.
Thomas Jones, Co-operative stores manager, was returned unopposed.
D.W. Davies regained the seat he lost three years previously.
In addition to the 66 councillors the council consisted of 22 county aldermen. Aldermen were elected by the council, and served a six-year term. Following the 1925 election, there were eleven Aldermanic vacancies, all of which were filled by Labour nominees (including one long-serving Liberal). These included the first woman elected to the Council, Rose Davies (Aberaman).
The following retiring aldermen were re-elected:
In addition, the following seven new aldermen were elected:
The following retiring aldermen were re-elected as members of the Council but were not re-elected as aldermen:
Eleven vacancies were caused by the election of aldermen. At Abercynon, Joseph Martin (Ind) who had been narrowly defeated by Rose Davies a few weeks earlier, again lost by a small margin. Labour also won a narrow victory at Abercynon where the newly elected councillor had, like Rose Davies, been immediately elected an alderman.