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

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

Note: "Votes" are the first preference votes.

1973: 3 x UUP, 1 x SDLP, 1 x Unity 1977: 2 x UUP, 2 x SDLP, 1 x DUP 1973-1977 Change: SDLP and DUP gain from UUP and Unity 1973: 2 x SDLP, 2 x Independent Republican, 1 x UUP 1977: 2 x SDLP, 1 x UUP, 1 x Independent Nationalist, 1 x Independent Republican 1973-1977 Change: SDLP gain from Independent Republican, Independent Nationalist leaves SDLP 1973: 4 x UUP, 1 x SDLP 1977: 4 x UUP, 1 x SDLP 1973-1977 Change: No change 1973: 3 x UUP, 1 x SDLP, 1 x Unity 1977: 2 x Independent, 1 x UUP, 1 x SDLP, 1 x DUP 1973-1977 Change: Independent (two seats) and DUP gain from UUP (two seats) and Unity