Elections to North Down Borough Council were held on 15 May 1985 on the same day as the other Northern Irish local government elections.

The election used four district electoral areas to elect a total of 24 councillors.

Note: "Votes" are the first preference votes.

1985: 2 x DUP, 2 x UUP, 1 x Alliance, 1 x UPUP 1985: 2 x UUP, 2 x Alliance, 1 x DUP, 1 x Independent Unionist 1985: 2 x UUP, 2 x Alliance, 2 x DUP, 1 x UPUP 1985: 2 x UUP, 2 x Alliance, 1 x DUP