John C. Sibbald (August 9, 1903 – January 12, 1956) was an American politician and businessman.
Born in Ashland, Wisconsin, Sibbald grew up in the town of Grandview, Wisconsin where he owned a general store.
In 1935, Sibbald served in the Wisconsin State Assembly on the Progressive ticket, but lost the nomination in 1936 to Laurie E.
[2] In 1937, Sibbald served as secretary to the speaker of the Wisconsin Assembly.
He worked for the Wisconsin State Beverage Tax Division, the United States Office of Price Administration, and finally the Wisconsin Department of Internal Revenue.