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

The election used five district electoral areas to elect a total of 27 councillors.

Note: "Votes" are the first preference votes.

1973: 3 x United Loyalist, 2 x SDLP, 1 x Alliance 1977: 3 x SDLP, 2 x UUP, 1 x DUP 1973-1977 Change: UUP (two seats), DUP and SDLP gain from United Loyalists (three seats) and Alliance 1973: 3 x United Loyalist, 1 x SDLP, 1 x Alliance 1977: 2 x UUP, 1 x DUP, 1 x SDLP, 1 x Alliance 1973-1977 Change: UUP (two seats) and DUP gain from United Loyalist (three seats) 1973: 3 x SDLP, 1 x Nationalist, 1 x Republican Clubs 1977: 3 x SDLP, 2 x Nationalist 1973-1977 Change: Nationalist gain from Republican Clubs 1973: 2 x SDLP, 1 x Nationalist, 1 x Alliance, 1 x United Loyalist 1977: 3 x SDLP, 1 x Nationalist, 1 x UUP 1973-1977 Change: SDLP and UUP gain from Alliance and United Loyalist 1973: 2 x SDLP, 2 x United Loyalist, 1 x Alliance, 1 x Nationalist 1977: 3 x SDLP, 1 x UUP, 1 x Alliance, 1 x Nationalist 1973-1977 Change: SDLP gain from United Loyalist