Oliver Wayne Stewart (May 22, 1867 – February 15, 1937) was an American politician who served as the chairman of the Prohibition Party and in the Illinois state House of Representatives.

[2] Oliver Wayne Stewart was born in Mercer County, Illinois on May 22, 1867, and attended Woodhull High School.

[8] In 1905 he was removed from his position as chairman after he was accused by former presidential nominee John G. Woolley and other prohibitionists of misappropriating over $50,000 and was replaced by Charles R. Jones of Philadelphia.

He was elected to the Illinois House of Representatives from the 5th district alongside Democrat Michael E. Hunt and Republican Aaron Norden.

[14] He became a public speaker and joined the Flying Squadron of America until his death on February 15, 1937, at Brokaw Hospital in Bloomington, Illinois after a short illness.