Harry C. Leinweber (January 6, 1907 – March 19, 1992) was a politician from Alberta, Canada.
He served in the Legislative Assembly of Alberta from 1961 to 1971 as a member of the Social Credit Party.
Leinweber first ran for a seat to the Alberta legislature in a by-election held on January 19, 1961, in the electoral district of Medicine Hat.
He defeated three other candidates with just under half the popular vote to hold the district for Social Credit.
[3] In the 1967 general election Leinweber won the district with just 40% of the popular vote over future MLA Jim Horsman.