The 1904 Glamorgan County Council election was the sixth contest for seats on this authority in south Wales.
Glamorgan County Council had been established by the Local Government Act 1888, the first elections being held in early 1889.
As in most parts of Wales, the Liberal Party was once again triumphant and won a majority of the seats.
In the Rhondda district, the local paper stated that 'no truer manifestation of good faith and respect for the retiring County Councillors could have been shown than that eight of them were returned unopposed.'
This was a contest in which the controversy over the education rate featured and the sitting member, a Roman Catholic, was defeated by the clerk of the former School Board.
[1] Jenkin Hill recaptured the seat he lost three years previously.
Griffith George, who had previously served on the Aberdare School Board and Aberdare Urban District Council had been invited to contest the seat three years previously but had declined.
[7] There was some criticism of George for opposing Parker at this election but he held on to win by 96 votes.
James Roberts had won the seat at a by-election following the death of the previous member, David Leyshon Enoch Davies, returned in 1901 following William Morgan's re-election as alderman, was elected unopposed.