the territory of nebraska was an organized incorporated territory of the united states. it existed from may 30, 1854, until march 1, 1867, when the part of the territory was admitted to the union as the state of nebraska. the nebraska territory was created by the kansas–nebraska act of 1854. the territorial capitol was omaha. the territory included areas of what is today nebraska, wyoming, south dakota, north dakota, colorado, and montana.