Elections to Antrim Borough 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 19 councillors.

Note: "Votes" are the first preference votes.

1985: 2 x UUP, 1 x SDLP, 1 x DUP, 1 x Sinn Féin 1989: 2 x SDLP, 2 x UUP, 1 x DUP 1985-1989 Change: SDLP gain from Sinn Féin 1985: 4 x UUP, 2 x DUP, 1 x SDLP 1989: 4 x UUP, 2 x DUP, 1 x SDLP 1985-1989 Change: No change 1985: 3 x UUP, 2 x DUP, 1 x SDLP, 1 x Alliance 1989: 4 x UUP, 1 x DUP, 1 x SDLP, 1 x Alliance 1985-1989 Change: UUP gain from DUP