An election to Carmarthen District Council was held on 7 May 1987.
On the same day there were elections to the other district local authorities and community councils in Wales.
[2] A limited number of boundary changes had taken place since the previous election.
The winning candidate had represented the SDP-Liberal Alliance at the 1983 election.
Two of the sitting Labour candidates were de-selected by the party, but stood successfully as independents.
The sitting member had been elected at a by-election following the death of Elwyn John.