John C. Spooner (January 6, 1843 - June 11, 1919) was a member of the United States Senate for the state of Wisconsin from 1885 - 1891 and again from 1897 - 1907.
Spooner was born in Lawrenceburg, Indiana, and later moved to Madison, Wisconsin in 1859. After serving in the military and attaining the rank of major, he sought a career in law, and was admitted to the bar in 1867. He first was appointed a US Senator in 1885, but was replaced by William F. Vilas in 1891. Afterwards he continued to practice law, and also ran for Governor of Wisconsin in 1892, but lost. In 1897 he was again elected to the Senate, and continued to serve until 1907, when he resigned.
Preceded by: Angus Cameron Class 3 U.S. Senator from Wisconsin (first term) 1885 - 1891 Succeeded by: William F. Vilas Preceded by: William F. Vilas Class 3 U.S. Senator from Wisconsin (later terms) 1897 - 1907 Succeeded by: Isaac Stephenson