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Kilbourn was born in Granby, Connecticut, United States, North America. In 1803, he moved with his family to Worthington, Ohio, which his father had helped found that year. Kilbourn's father was James Kilbourne, a colonel during the War of 1812 and a U.S. Representative from Ohio from 1813 to 1817.
Byron Kilbourn worked in Ohio as a surveyor and as a state engineer. He first visited Wisconsin in 1834, landing at Green Bay, and worked as a government surveyor in the area. He later deemed the area near the Milwaukee River to be a promising location for commerce, and he purchased land there. In 1837 Byron Kilbourn founded Kilbourntown (present day Westown), which rivaled with Solomon Juneau's Juneautown (present day East Town) and George Walker's Walker's Point. He was a key figure in the Milwaukee Bridge War in 1845. In 1846, the three combined and formed the city of Milwaukee, Wisconsin. He served in the Wisconsin Territorial House of Representatives in 1845 and was a member of the second Wisconsin Constitutional Convention of 1847. Kilbourn also served as a Milwaukee alderman and was elected to two non-consecutive terms as mayor in 1848 and 1854.
When working as a highway commissioner for the Wisconsin Territorial Legislature, Kilbourn founded what was to become the City of West Bend in 1845, and Kilbourn City, now known as the city of Wisconsin Dells in 1857. Byron Kilbourn became involved in the railroad industry, serving as president of the Milwaukee and Mississippi Railroad for about three years from around 1849 until 1852. He was fired by the railroad's board of directors following allegations of mismanagement and fraud. He then started a new railroad from Milwaukee to La Crosse as a competitor with his former railroad. Kilbourn's public career was ruined following a scandal alleging the use of railroad bonds to bribe state officials for land grants necessary to start the railroad. The La Crosse and Milwaukee railroad failed in the aftermath of the scandal and subsequent investigations.
According to the Milwaukee Journal Sentinel, Kilbourn's remains were returned to Milwaukee for interment at Forest Home Cemetery in late 1998. Historic Milwaukee, Inc worked to have him re-interred stating that he was the only one of the three Milwaukee founders not buried in Milwaukee.
- Wisconsin Historical Society (date unknown). Byron Kilbourn, Wisconsin Historical Society. Retrieved from Term: Kilbourn, Byron 1801 - 1870.
- "James Kilbourne". Appleton's cyclopædia of American biography 3. 1887. p. 534. Appletons' Cyclopædia of American Biography
- Milwaukee Journal Sentinel. Historic Undertaking. Jo Sandin. 20 Nov 1998.
- "Another pioneer gone". (Dec. 19, 1870). Milwaukee Sentinel.
Horatio N. Wells
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Don A. J. Upham
George H. Walker
|Mayor of Milwaukee
James B. Cross