William Lisowsky (January 1, 1892 – 1958) was a politician in Manitoba, Canada.
He served in the Legislative Assembly of Manitoba from 1936 to 1941, as a representative of the Social Credit League.
He was educated in Brandon and Winnipeg, and worked as a public school teacher.
Voters elected only five Social Credit party five candidates in this election, but it played a significant role in the subsequent parliament by supporting John Bracken's minority Liberal-Progressive government.
Social Credit members formally joined an all-party coalition government in 1940.