1989 Castlereagh Borough Council election

Main article: Northern Ireland local elections, 1989
1989 Castlereagh Borough Council election
← 1985 17 May 1989 (1989-05-17) 1993 →
All 21 seats to Castlereagh Borough Council
11 seats needed for a majority
  First party Second party Third party
 
Party DUP UUP Alliance
Seats won 9 6 4
Seat change Decrease 1 Decrease 2 Increase 1
  Fourth party Fifth party
 
Party UPUP Ind. Unionist
Seats won 1 1
Seat change Increase 1 Increase 1

Elections to Castlereagh Borough Council were held on 17 May 1989 on the same day as the other Northern Irish local government elections. The election used three district electoral areas to elect a total of 21 councillors.