1973 Castlereagh District Council election

Main article: Northern Ireland local elections, 1973
1973 Castlereagh Borough Council election
30 May 1973 (1973-05-30) 1977 →
All 19 seats to Castlereagh Borough Council
10 seats needed for a majority
  First party Second party Third party
 
Party UUP Alliance United Loyalist
Seats won 10 5 2
  Fourth party Fifth party
 
Party Loyalist Coalition Independent
Seats won 1 1

Elections to Castlereagh Borough Council were held on 30 May 1973 on the same day as the other Northern Irish local government elections. The election used three district electoral areas to elect a total of 19 councillors.