By 1937 the Labour Party held almost all the seats in the industrial eastern part of the county.

At Kidwelly, Sir Alfred Stephens, a member of the Council since 1898 (apart from a short interval between 1907 and 1910) decided to retire.

In Llanelly Ward 3, Haddon Jones was displaced by another Independent, Jim Jones, while in Ward 4, Martin Edwards, a member of Llanelly Borough Council won the seat previously held by the late Tom Charles.

[3] In Ward 8, W. Powell Rees, who had lost his borough council seat to Communist Brin James in 1935, now faced the same oppoenent in the county election.

Much attention was also focused on Lady Howard Stepney's successful campaign in Pembrey ward.

[4] A by-election was held in May due to the elevation of Gwendoline Trubshaw, the current chair of Carmarthenshire County Council, to the aldermanic bench.

The Labour candidate secured a narrow victory over a former long-serving member of the Llanelly Borough Council.