The sixth election to the Carmarthenshire County Council was held in March 1904. It was preceded by the 1901 election and followed by the 1907 election.
The Liberals retained a strong majority. With a few exceptions, members were returned unopposed. Education was the key issue and the election caused more controversy, with several sitting members changing their political allegiances.
There were no boundary changes.
There were only a small number of contested elections and the majorities were small in most instances.
The aldermen who retired at the election were
This section summarises the detailed results which are noted in the following sections. In some cases there is an ambiguity in the sources over the party affiliations and this is explained below where relevant.
This table summarises the result of the elections in all wards. 51 councillors were elected.
In view of the controversy over education candidates stood as Unionists rather than Conservatives. However, the label Unionist has been used only for those former Liberals who stood under this banner.
David Thomas had been elected as a Conservative in 1901.
William Jones had been elected as an Independent at previous elections.
Gwynne Hughes had previously sat as a Liberal.
Gwynne Hughes had previously sat as a Liberal and failed to defend the seat as an Unionist.
Williams was one of two Liberal candidates in 1901 when both polled the same number of votes and Williams lost on the toss of a coin.
this ward was not recorded in the local press.
Dr Thomas had sat as a Conservative but was said to have fought this election as a 'radical'.
In addition to the 51 councillors the council consisted of 17 county aldermen. Aldermen were elected by the council, and served a six-year term. Following the elections the following nine aldermen were elected (with the number of votes recorded in each case).
All the elected aldermen were supported by the majority of members.