Elections to Coleraine Borough Council were held on 18 May 1977 on the same day as the other Northern Irish local government elections.

The election used three district electoral areas to elect a total of 20 councillors.

Note: "Votes" are the first preference votes.

1973: 4 x UUP, 1 x SDLP, 1 x Independent Unionist 1977: 3 x UUP, 1 x SDLP, 1 x DUP, 1 x Independent Unionist 1973-1977 Change: DUP gain from UUP 1973: 5 x UUP, 2 x Alliance 1977: 4 x UUP, 1 x Alliance, 1 x SDLP, 1 x Independent Unionist 1973-1977 Change: SDLP gain from Alliance, Independent Unionist leaves UUP 1973: 4 x UUP, 2 x Independent, 1 x Alliance 1977: 3 x UUP, 2 x Independent, 1 x DUP, 1 x Alliance 1973-1977 Change: DUP gain from UUP