Omaha, Missouri From Wikipedia, the free encyclopedia Unincorporated community in Missouri, United States Omaha is an unincorporated community in Putnam County, in the U.S. state of Missouri.[1] The first permanent settlement at Omaha was made in 1845.[2] A post office called Omaha was established in 1860, and remained in operation until 1908.[3] The name "Omaha" was assigned by postal officials.[2] References ↑ U.S. Geological Survey Geographic Names Information System: Omaha, Missouri 1 2 "Putnam County Place Names, 1928–1945". The State Historical Society of Missouri. Archived from the original on June 24, 2016. Retrieved December 11, 2016. ↑ "Post Offices". Jim Forte Postal History. Retrieved December 11, 2016. vteMunicipalities and communities of Putnam County, Missouri, United StatesCounty seat: UnionvilleCity Unionville Map of Missouri highlighting Putnam CountyVillages Livonia Lucerne Powersville Worthington Townships Elm Grant Jackson Liberty Lincoln Medicine Richland Sherman Union Wilson York Unincorporatedcommunities Chapel Chariton Elko Esper Galesburg Glendale Graysville Hartford Lemons Martinstown Omaha Quinn Rosewood St. John Sidney Wyreka Ghost towns Howland Lickskillet Terre Haute West Liberty Missouri portal United States portal 40°31′57″N 92°48′03″W / 40.53250°N 92.80083°W / 40.53250; -92.80083 This Putnam County, Missouri state location article is a stub. You can help Wikipedia by expanding it.vte Related Articles~TimelinesTop QsFact Checks