William Warren Allmand, P.C., O.C., Q.C., B.A., B.C.L., (born September 19, 1932) is a Canadian Liberal Party politician and was a Cabinet member from 1972 to 1979.

He was born in Montreal and studied civil law at McGill University and comparative law at the University of Paris. He was admitted to the Québec bar in 1958. In 1965, he was elected to the Canadian parliament. He was sworn to the Privy Council on November 27, 1972 and has held the three cabinet posts of Solicitor General (November 27, 1972 - September 14, 1976), Indian Affairs and Northern Development (September 14, 1976 - September 16, 1977), and finally Consumer and Corporate Affairs (September 16, 1977 - June 4, 1979).

He also has served as the president of the International Centre for Human Rights and Democratic Development from 1997 to 2002.

In 2000 he was made an Officer of the Order of Canada.

He is currently teaching International Human Rights at McGill University as a visiting scholar at the Institute of Canadian Studies.

|- style="text-align: center;" | width="30%" |Preceded by:
Previously called Notre-Dame-de-Grâce | width="40%" style="text-align: center;" |Member of Parliament for Notre-Dame-De-Grace—Lachine East
1980-1987 | width="30%" |Succeeded by:
The electoral district was abolished in 1987

|- style="text-align: center;" | width="30%" |Preceded by:
Previously called Notre-Dame-De-Grace--Lachine East | width="40%" style="text-align: center;" |Member of Parliament for Notre-Dame-de-Grâce
1987-1997 | width="30%" |Succeeded by:
The electoral district was abolished in 1996.