Elections to Ballymoney Borough Council were held on 18 May 1977 on the same day as the other Northern Irish local government elections. The election used three district electoral areas to elect a total of 16 councillors.
<small>Note: "Votes" are the first preference votes.</small>
|- class="unsortable" align="centre" !rowspan=2 align="left"|Ward ! % <br /> !Cllrs<br /> ! % <br /> !Cllrs<br /> ! %<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;">DUP</span> !colspan=2 bgcolor="" | <span style="color:black;">SDLP</span> !colspan=2 bgcolor="" | <span style="color:black;">Alliance</span> !colspan=2 bgcolor="white"| <span style="black;">Others</span> |- |align="left"|Area A |37.6 |2 |bgcolor="#D46A4C"|42.5 |bgcolor="#D46A4C"|2 |0.0 |0 |10.2 |0 |9.7 |0 |4 |- |align="left"|Area B |bgcolor="40BFF5"|37.1 |bgcolor="40BFF5"|3 |18.1 |1 |30.6 |3 |0.0 |0 |14.2 |1 |8 |- |align="left"|Area C |7.6 |0 |0.0 |0 |0.0 |0 |22.0 |0 |bgcolor="#DDDDDD"|70.4 |bgcolor="#DDDDDD"|3 |4 |- |- class="unsortable" class="sortbottom" style="background:#C9C9C9" |align="left"| Total |29.4 |5 |19.2 |3 |15.1 |3 |8.3 |1 |28.0 |4 |16 |-
1973: 1 x DUP, 1 x UUP, 1 x Independent Unionist, 1 x Independent<br /> 1977: 2 x DUP, 2 x UUP<br /> 1973-1977 Change: DUP gain from Independent, Independent Unionist joins UUP
1973: 3 x UUP, 2 x SDLP, 2 x Independent Unionist, 1 x Independent Nationalist<br /> 1977: 3 x UUP, 3 x SDLP, 1 x DUP, 1 x Independent<br /> 1973-1977 Change: DUP, SDLP and Independent gain from UUP (two seats) and Independent Nationalist, Independent Unionists (two seats) join UUP
1973: 2 x Independent, 1 x Alliance, 1 x Independent Unionist<br /> 1977: 2 x Independent, 1 x Alliance, 1 x Independent Unionist<br /> 1973-1977 Change: No change