The members of the 28th Manitoba Legislature were elected in the Manitoba general election held in June 1966. The legislature sat from December 5, 1966, to May 22, 1969. The Progressive Conservative Party led by Duff Roblin formed the government. Walter Weir became Premier in 1967 after Roblin resigned to run unsuccessfully for the federal Progressive Conservative Party leadership. Gildas Molgat of the Liberal Party was Leader of the Opposition. A new sales tax of 5% was introduced effective June 1, 1967. James Bilton served as speaker for the assembly.