Francis Wellington Hay (November 17, 1864 – April 1, 1932) was a grain merchant and Canadian politician.
He worked for the Federal Bank for three years before entering the family grain business.
He served as leader of the Ontario Liberal Party in the provincial legislature from 1921 to 1923 but resigned after the one election campaign he led the party through saw the Liberals drop in representation from 27 to 14 seats.
In 1926 he was elected to the House of Commons as a member of the Liberal Party but did not run for re-election in 1930.
His uncle David Davidson Hay had previously served in the provincial assembly.