The 1920 Donegal County Council election elected 45 councilors from ten electoral divisions and Sinn Fin, an Irish republican and democratic socialist political party, won a majority of the seats.
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. Sinn Fein won a majority of the seats, and won majorities in 6 of the 10 voting areas. Sinn Fein (/n fen/ shin FAYN, Irish: [n fen; English: "[We] Ourselves") is an Irish republican and democratic socialist political party active in both the Republic of Ireland and Northern Ireland. Sinn Fein 14 
