A territory of the north-central United States organized in 1861 and divided into the states of North Dakota and South Dakota in 1889. The territory included much of present-day Montana until 1864 and Wyoming until 1868.
That part which lies east of the mountains was included in the Louisiana Purchase of 1803 and became successively a part of Missouri Territory in 1812, of Nebraska Territory in 1854, of Dakota Territory in 1861 and of Idaho Territory in 1863; that which lies west of the mountains became successively a part of Oregon Territory in 1848, of Washington Territory in 1853 and of Idaho Territory in 1863.
In 1870 the population of that portion of Dakota Territory included within the present limits of North Dakota was 2405; in 2880, 36,909.
The state debt, excluding the amount of Territorial indebtedness assumed when Dakota Territory was divided, may not exceed $200,000.
The boundary between Dakota Territory and Nebraska was slightly altered in 1870 and 1882.
Census Records The first federal census Records The first federal census for North Dakota was 1870, as the Dakota Territory.