Elections to Cookstown District 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 15 councillors.

Note: "Votes" are the first preference votes.

1973: 2 x UUP, 1 x Republican Clubs, 1 x Loyalist Coalition, 1 x Independent Nationalist 1977: 1 x UUP, 1 x SDLP, 1 x DUP, 1 x UUUP, 1 x Independent Nationalist 1973-1977 Change: SDLP and DUP gain from UUP and Republican Clubs, Loyalist Coalition joins UUUP 1973: 3 x UUP, 2 x SDLP, 1 x Independent Nationalist 1977: 2 x SDLP, 2 x UUUP, 1 x UUP, 1 x Independent Republican 1973-1977 Change: UUUP (two seats) and Independent Republican gain from UUP (two seats) and Independent Nationalist 1973: 3 x UUP, 1 x SDLP 1977: 2 x UUP, 2 x SDLP 1973-1977 Change: SDLP gain from UUP