Plaid Cymru won a majority of seats for the first time, whilst losing their leader, Emlyn Dole.

[2] Welsh Labour regained some ground in Carmarthenshire by winning seats in the Amman Valley and Llanelli constituency from Plaid Cymru.

Despite winning a majority of seats, Plaid Cymru formed a coalition with eight independent councillors.

The number of councillors were increased by 1 after the Local Democracy and Boundary Commission for Wales recommended the change in a report in August 2019.

[4] Of the other wards:[8] Plaid Cymru won 38 out of 75 seats to gain a majority on the council for the first time, despite the defeat of their leader, Emlyn Dole.

[citation needed] Sean Rees had stood in Glanymor in 2017 as a Plaid Cymru candidate and missed out on being elected by a single vote.

[citation needed] A by-election was held in Elli on 6 March 2024 following the resignation of Independent councillor John Jenkins.