Elections to Cookstown 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 16 councillors.

Note: "Votes" are the first preference votes.

1985: 2 x DUP, 2 x Sinn Féin, 1 x SDLP, 1 x UUP 1989: 2 x DUP, 2 x SDLP, 1 x Sinn Féin, 1 x UUP 1985-1989 Change: SDLP gain from Sinn Féin 1985: 2 x DUP, 1 x SDLP, 1 x UUP, 1 x Sinn Féin 1989: 2 x DUP, 2 x SDLP, 1 x UUP 1985-1989 Change: SDLP gain from Sinn Féin 1985: 1 x Sinn Féin, 1 x SDLP, 1 x UUP, 1 x DUP, 1 x Independent Unionist 1989: 1 x Sinn Féin, 1 x SDLP, 1 x UUP, 1 x DUP, 1 x Independent Unionist 1985-1989 Change: No change