Elections to North Down Borough Council were held on 5 May 2011 on the same day as the other Northern Irish local government elections. The election used four district electoral areas to elect a total of 25 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;">DUP</span> !colspan=2 bgcolor="" | <span style="color:black;">Alliance</span> !colspan=2 bgcolor="" | <span style="color:black;">UUP</span> !colspan=2 bgcolor="" | <span style="color:black;">Green</span> !colspan=2 bgcolor="white"| <span style="black;">Others</span> |- |align="left"|Abbey |bgcolor="#D46A4C"|48.0 |bgcolor="#D46A4C"|4 |14.7 |1 |9.7 |0 |11.5 |1 |16.1 |0 |6 |- |align="left"| Ballyholme and Groomsport |bgcolor="#D46A4C"|37.8 |bgcolor="#D46A4C"|3 |13.7 |1 |12.8 |1 |4.7 |0 |31.0 |2 |7 |- |align="left"|Bangor West |bgcolor="#D46A4C"|28.9 |bgcolor="#D46A4C"|2 |17.9 |2 |14.0 |2 |4.3 |0 |34.9 |1 |7 |- |align="left"|Holywood |30.6 |2 |bgcolor="#F6CB2F"|31.9 |bgcolor="#F6CB2F"|2 |21.2 |1 |12.0 |0 |4.3 |0 |5 |- class="unsortable" class="sortbottom" style="background:#C9C9C9" |align="left"| Total |36.2 |8 |18.3 |6 |13.9 |4 |7.4 |1 |24.2 |3 |25 |-
2005: 3 x DUP, 2 x UUP, 1 x Alliance<br /> 2011: 4 x DUP, 1 x Alliance, 1 x Green<br /> 2005-2011 Change: DUP and Green gain from UUP (two seats)
2005: 2 x DUP, 2 x UUP, 2 x Independent, 1 x Alliance<br /> 2011: 3 x DUP, 2 x Independent, 1 x Alliance, 1 x UUP<br /> 2005-2011 Change: DUP gain from UUP
2005: 2 x DUP, 2 x UUP, 2 x Alliance, 1 x Green<br /> 2011: 2 x DUP, 2 x UUP, 2 x Alliance, 1 x Independent<br /> 2005-2011 Change: Green becomes Independent
2005: 2 x UUP, 2 x Alliance, 1 x DUP<br /> 2011: 2 x Alliance, 2 x DUP, 1 x UUP<br /> 2005-2011 Change: DUP gain from UUP