1989 Mid Glamorgan County Council election

The 1989 Mid Glamorgan County Council election was held in May 1989 and was the fifth full election to Mid Glamorgan County Council. It was preceded by the 1985 election and followed by the 1993 election.

There were extensive boundary changes at this election, following The County of Mid Glamorgan (Electoral Arrangements) Order 1988. The number of wards were increased to 74, each electing one councillor.

Overview
The Labour Party retained overall control winning 65 of the 74 seats.

* existing councillor, for the same ward

o existing councillor, though because of boundary changes not for the same ward