An election to the Carmarthen Rural District Council in Wales was held in April 1928. It was preceded by the 1925 election and was followed by the 1931 election. A large number of candidates had been returned unopposed. The successful candidates were also elected to the Carmarthen Board of Guardians.
There were no boundary changes but an additional seat had been created at St Ishmaels. In addition, the number of guardians representing the Carmarthen town were increased from six to eight and the four county council wards were adopted in place of electing six members for the whole town.
23 Independent candidates (well over half the membership of the council) were returned unopposed and only two of wards were contested by Labour candidates, one of whom was returned unopposed at Llanarthne.
All members of the District Council also served as members of Carmarthen Board of Guardians. In addition six members were elected to represent the borough of Carmarthen. All six sitting members were returned unopposed.