An kafa shi ne a ranar 20 ga Disamba, 1818, daga Orange, Pike da Perry counties. An kira shi ne don Toussaint Dubois, wani ɗan Faransa wanda ya yi yaƙi a cikin Yakin Juyin Juya Halin Amurka, Yaƙin Tippecanoe da Yaƙin 1812. Dubois dan kasuwa ne wanda ya zauna a Vincennes. Ya nitse a 1816 yayin da yake tsallaka Kogin Little Wabash kusa da Lawrenceville, Illinois.A 1818, kusan rabin mazaunan gundumar sun mutu daga cutar madara. Akwai ra'ayi ɗaya cewa mahaifiyar Ibrahim Lincoln, Nancy Hanks Lincoln ta mutu daga wannan cutar mai rikitarwa a wancan lokacin. An haifar da shi ne ta hanyar shan madara ko cin naman shanu da suka ci fararen maciji.
Ba'amurke