When Illinois became a territory in 1809, the office of Territorial Adjutant General was created. William Alexander was the serving Territorial Adjutant General when Illinois became the 21st State of the Union. Elias Rector served twice as Territorial Adjutant General. Simon Bolivar Buckner served as the Illinois Adjutant General in 1857, three years before he became a Confederate General during the Civil War. Illinois’ longest serving Adjutant General was Major General Leo Boyle, who held the office for 28 years. Major General Harold Holesinger is the only Illinois Adjutant General to come from the Illinois Air National Guard.
Elias Rector3 May 1809 - 18 July 1809
Robert Morrison 18 July 1809 - 28 May 1810
Elias Rector28 May 1810 - 25 October 1813
William Alexander 27 October 1814 - 10 June 1821
Elijah C. Berry 11 June 1821 - 21 January 1835
William C. Kenney 9 December 1857 - 24 October 1858
Edward P. Niles 25 May 1868 - 23 March 1869
Hiram Hillard 2 July 1875 - 1 August 1881
Charles C. Hilton 4 January 1896 - 1 February 1897
Jasper N. Vance 2 February 1897 - 19 January 1902































