A referendum was held in Ontario, Canada on October 20, 1919 (in conjunction with the 15th provincial election) on the legality of alcoholic beverages and the maintaining of prohibition.

Prohibition had been passed by the provincial government in 1916 under the Ontario Temperance Act, though a clause required a referendum to be held in 1919 on whether the Act should be repealed and the previous licensing laws subsequently revived.

[2] A majority voted against all four questions, and prohibition was maintained.

[3] Unlike past prohibition referendums, the four questions were binding upon receiving a majority vote.

[3] As the majority voted no on all four questions, prohibition was not repealed.