1985 Castlereagh Borough Council election

Elections to Castlereagh Borough Council were held on 15 May 1985 on the same day as the other Northern Irish local government elections. The election used three district electoral areas to elect a total of 21 councillors.

Election results
Note: "Votes" are the first preference votes.

Districts summary
!rowspan=2 align="left"|Ward ! %
 * - class="unsortable" align="centre"

!Cllrs

! %

!Cllrs

! %

!Cllrs

! %

!Cllrs

!rowspan=2|Total Cllrs

!colspan=2 bgcolor="" | DUP !colspan=2 bgcolor="" | UUP !colspan=2 bgcolor="" | Alliance !colspan=2 bgcolor="white"| Others
 * - class="unsortable" align="center"
 * align="left"|Castlereagh Central
 * bgcolor="#D46A4C"|58.2
 * bgcolor="#D46A4C"|4
 * 19.6
 * 2
 * 20.5
 * 1
 * 1.7
 * 0
 * 7
 * align="left"|Castlereagh East
 * bgcolor="#D46A4C"|46.2
 * bgcolor="#D46A4C"|3
 * 31.9
 * 3
 * 18.1
 * 1
 * 3.8
 * 0
 * 7
 * align="left"|Castlereagh South
 * bgcolor="#D46A4C"|40.1
 * bgcolor="#D46A4C"|3
 * 35.5
 * 3
 * 17.7
 * 1
 * 6.7
 * 0
 * 7
 * - class="unsortable" class="sortbottom" style="background:#C9C9C9"
 * align="left"| Total
 * 48.0
 * 10
 * 29.0
 * 8
 * 18.8
 * 3
 * 4.2
 * 0
 * 21
 * }
 * 0
 * 21
 * }
 * }

Castlereagh Central
1985: 4 x DUP, 2 x UUP, 1 x Alliance

Castlereagh East
1985: 3 x DUP, 3 x UUP, 1 x Alliance

Castlereagh South
1985: 3 x DUP, 3 x UUP, 1 x Alliance