Elections to Castlereagh Borough Council were held on 19 May 1993 on the same day as the other Northern Irish local government elections.

The election used four district electoral areas to elect a total of 23 councillors.

Note: "Votes" are the first preference votes.

1993: 3 x DUP, 1 x Alliance, 1 x UUP, 1 x Independent Unionist 1993: 3 x DUP, 1 x Alliance, 1 x UUP, 1 x UPUP, 1 x Independent Unionist 1993: 2 x Alliance, 2 x UUP, 1 x DUP 1993: 2 x UUP, 2 x DUP, 1 x Alliance