Zadok Casey (March 7, 1796 – September 4, 1862) was an American politician who served as a U.S. Representative from Illinois from 1833 to 1843. He founded the city of Mount Vernon around 1817. He was elected to the Illinois House of Representatives in 1822 and to the Illinois State Senate in 1826, and was elected the fourth Lieutenant Governor in 1830. He served in the Twenty-third United States Congress (1833) through the Twenty-seventh United States Congress (1843). He was a Jacksonian Democrat, and he was elected to his final term as an Independent Democrat. He again served in the Illinois House from 1848 to 1852, serving as speaker in 1852, and in the State Senate from 1860 to 1862.
|Member of the U.S. House of Representatives|
from Illinois's 2nd district
March 4, 1833 – March 3, 1843
|Preceded by||District created|
|Succeeded by||John Alexander McClernand|
|4th Lieutenant Governor of Illinois|
December 9, 1830 – March 1, 1833
|Preceded by||William Kinney|
|Succeeded by||William Lee D. Ewing|
|14th Speaker of the Illinois House of Representatives|
January 1, 1849 – January 6, 1851
|Preceded by||Newton Cloud|
|Succeeded by||Sidney Breese|
|Born||March 7, 1796|
Greene County, Georgia
|Died||September 4, 1862 66) (aged|
Zadok Casey was born in Greene County, Georgia. Not much is known about his early life. One story is that, as a young man, he witnessed a murder. Because he did not wish to testify, he fled to the frontier. He died in Caseyville, Illinois at age 66, and was interred at Old Union Cemetery in Mount Vernon.
Casey's popularity among his neighbors was such that he twice received the support of every other voter in Jefferson County — when he ran for the Senate in 1826 and for Lieutenant Governor in 1830, only one opposing vote was cast in either election, and that vote was Casey's own.
Caseyville, Illinois was named after Zadok Casey due to his help to finance the Mississippi and Ohio Railroad which runs through the center of town.
- "Biographical Directory of the United States Congress". Biographical Directory of the United States Congress. Office of Art and Archives. Retrieved 27 January 2015.
- Wall, John A. Wall's History of Jefferson County Illinois. Indianapolis: Bowen, 1909, 57.
- United States Congress. "Zadok Casey (id: C000230)". Biographical Directory of the United States Congress.
- Perrin, History of Jefferson County, Illinois, 1883
| Lieutenant Governor of Illinois
William Lee D. Ewing
|U.S. House of Representatives|
| Member of the U.S. House of Representatives
from Illinois's 2nd congressional district
John A. McClernand
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