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.
Election results PartySeats±First Pref. votesFPv%±% 1014,28250.6 56,24822.1United Loyalist23,80913.5Loyalist Coalition11,0623.8 19023.2 01,5645.5 03441.2Totals1928,213100.0—
Districts summary
|- class="unsortable" align="centre" !rowspan=2 align="left"|Ward ! % !Cllrs ! % !Cllrs ! % !Cllrs !rowspan=2|TotalCllrs |- class="unsortable" align="center" !colspan=2 bgcolor="" | UUP !colspan=2 bgcolor="" | Alliance !colspan=2 bgcolor="white"| Others |- |align="left"|Area A |bgcolor="#40BFF5"|55.4 |bgcolor="#40BFF5"|3 |25.8 |2 |18.8 |1 |6 |- |align="left"|Area B |bgcolor="#40BFF5"|41.2 |bgcolor="#40BFF5"|4 |20.8 |2 |38.0 |2 |8 |- |align="left"|Area C |bgcolor="#40BFF5"|59.6 |bgcolor="#40BFF5"|3 |19.9 |2 |20.5 |1 |5 |- class="unsortable" class="sortbottom" style="background:#C9C9C9" |align="left"| Total |50.6 |10 |22.1 |5 |27.3 |4 |19
Districts results
Area A
1973: 3 x UUP, 2 x Alliance, 1 x United Loyalist
Area B
1973: 4 x UUP, 2 x Alliance, 1 x United Loyalist, 1 x Loyalist Coalition
Area C
1973: 3 x UUP, 1 x Alliance, 1 x Independent
References