Elections to Strabane District 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 15 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 /> ! % <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;">Sinn Féin</span> !colspan=2 bgcolor="" | <span style="color:black;">Alliance</span> !colspan=2 bgcolor="white"| <span style="black;">Others</span> |- |align="left"|Derg |19.0 |1 |bgcolor="#D46A4C"|25.2 |bgcolor="#D46A4C"|1 |10.6 |1 |21.1 |1 |1.1 |0 |23.0 |1 |5 |- |align="left"|Glenelly |26.5 |1 |bgcolor="#D46A4C"|36.2 |bgcolor="#D46A4C"|2 |24.6 |1 |10.2 |0 |2.5 |1 |0.0 |0 |5 |- |align="left"|Mourne |16.2 |1 |0.0 |0 |18.9 |1 |30.6 |1 |0.0 |0 |bgcolor="#CDFFAB"|34.3 |bgcolor="#CDFFAB"|2 |5 |- |- class="unsortable" class="sortbottom" style="background:#C9C9C9" |align="left"| Total |20.3 |3 |19.7 |3 |17.9 |3 |21.1 |2 |1.1 |1 |19.9 |2 |15 |-
1985: 2 x DUP, 1 x Sinn Féin, 1 x UUP, 1 x Independent Nationalist<br /> 1989: 1 x DUP, 1 x Sinn Féin, 1 x UUP, 1 x SDLP, 1 x Independent Unionist<br /> 1985-1989 Change: SDLP and Independent Unionist gain from DUP and Independent Nationalist
1985: 2 x DUP, 1 x UUP, 1 x SDLP, 1 x Sinn Féin<br /> 1989: 2 x DUP, 1 x UUP, 1 x SDLP, 1 x Alliance<br /> 1985-1989 Change: Alliance gain from Sinn Féin
1985: 2 x SDLP, 1 x Sinn Féin, 1 x UUP, 1 x Independent Nationalist<br /> 1989: 2 x Independent Nationalist, 1 x SDLP, 1 x Sinn Féin, 1 x UUP<br /> 1985-1989 Change: Independent Nationalist leaves SDLP