Indiana’s Gore became a part of Indiana Territory on 1 March 1803. Indiana was granted statehood in 1816.
1807 Territorial Census
Fraustein, Rebah Morgan. Census of Indiana Territory for 1807. Indianapolis : Indiana Historical Society, 1980.
Indiana Territorial Court Orders (1800-1816) digitized by IUPUI (free)
Stemmons, John D. & E. Diane, compilers. Indiana Election Returns, 1809, 1812. Sandy, Utah : Census Publishing, LC, 2004. [From William Hayden English Family Papers, Indiana Historical Society, Collection #98.]
Franklin, Charles M. Indiana Territorial Pioneer Records, 1801-1815. 3 volumes. Heritage House, 1983. [From William H. English Collection at University of Chicago.]
Cyndi’s List – IndianaFamilySearch Wiki – Indiana
Indiana Genealogical Society – many online databases (free and members-only)
Indiana Historical Society
Indiana State Library
Indiana State Archives (Catalog)