Sinn Féin An election to Donegal County Council took place on Wednesday 26 May 1920 as part of that year's Irish local elections.

45 councillors were elected from 10 electoral divisions by PR-STV voting for a five-year term of office.

[1] The total number of invalid votes for the county stood at 9,193.

Ward (Sinn Féin) was elected chairman.

Thomas McFadden (Unionist) was elected vice-chairman.