1977 South Glamorgan County Council election

The second election to South Glamorgan County Council was held in May 1977. It was preceded by the 1973 election and followed by the 1981 election.

Boundary changes
There were no boundary changes but the balance of representation in the Penarth wards appears to have changed with the North/Central ward gaining a seat and the West ward losing one.

Candidates
Conservative and Labour candidates contested the vast majority of seats. In contrast with four years previously there were more Liberal candidates together with a smaller number of Plaid Cymru candidates and Independents.

Outcome
When the authority was established the Conservatives had hoped to win control but failed to do so in 1973. However, they won control at this election, with sweeping gains across Cardiff and the Vale, including some seats which the party had not fully contested at the previous election. Defeated candidates included the leader of the council, Jack Leonard.

Barry, Illtyd (one seat)
Councillor Tresize had sat for the Cadoc Ward at the previous election.

Whitchurch (three seats)
KEY

+ indicates sitting councillor but for different ward
 * indicates sitting councillor for the ward