Elections to Carrickfergus 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 15 councillors.
|- class="unsortable" align="centre" !rowspan=2 align="left"|Ward ! % <br /> !Cllrs<br /> ! % <br /> !Cllrs<br /> ! %<br /> !Cllrs<br /> !rowspan=2|Total<br />Cllrs<br /> |- class="unsortable" align="center" !colspan=2 bgcolor="" | <span style="color:black;">UUP</span> !colspan=2 bgcolor="" | <span style="color:black;">Alliance</span> !colspan=2 bgcolor="white"| <span style="black;">Others</span> |- |align="left"|Area A |bgcolor="40BFF5"|39.8 |bgcolor="40BFF5"|2 |26.6 |1 |33.6 |2 |5 |- |align="left"|Area B |25.1 |2 |25.5 |1 |bgcolor="orange"|49.4 |bgcolor="orange"|2 |5 |- |align="left"|Area C |20.8 |1 |15.2 |1 |bgcolor="orange"|64.0 |bgcolor="orange"|3 |5 |- |- class="unsortable" class="sortbottom" style="background:#C9C9C9" |align="left"| Total |28.3 |5 |22.3 |3 |49.4 |7 |15 |-
1973: 2 x UUP, 1 x United Loyalist, 1 x Alliance
1973: 2 x UUP, 1 x Alliance, 1 x United Loyalist, 1 x Independent
1973: 2 x United Loyalist, 1 x UUP, 1 x Alliance, 1 x Loyalist