Labour Elections to Cumnock and Doon Valley District Council were held on 3 May 1984, on the same day as the other Scottish local government elections.

This was the fourth election to the district council following the local government reforms in the 1970s.

The election was the first to use the 10 wards created by the Initial Statutory Reviews of Electoral Arrangements in 1981.

Each ward elected one councillor using first-past-the-post voting.

[1] Labour maintained control of the district council after winning all 10 seats although four wards were uncontested after only Labour stood a candidate.