Map showing North American territorial boundaries leading up to the American Revolution and the founding of the United States: British claims are indicated in red and pink, while Spanish claims are in orange and yellow.
Map of the United States in 1812
$1 City of Omaha 1857 uniface banknote. The note is signed by Jesse Lowe in his function as Mayor of Omaha City. It was issued as scrip in 1857 to help fund the erection of the territorial capitol building at Omaha.
Map showing mid 17th century claims and land grant boundaries. Some colonies seen here are: Nova Scotia (NSc), Territory of Sagadahock (TS), First Province of Maine (Me), New Hampshire (NH), Plymouth (PC), Massachusetts Bay (MBC), New Netherland (NN), New Sweden (NSw), and Lord Baltimore's Land (Md; Maryland)
Site No. JF00-072: The Nebraska–Kansas state line at the intersection of Nebraska counties Thayer and Jefferson and Kansas counties Washington and Republic
The front page of the December 6, 1854 issue of the Nebraska Palladium, the first newspaper to be published in the Nebraska Territory
New World settlements of The Netherlands, collectively called New Netherland
1855 first edition of Colton's map of the Nebraska and Kansas Territories
The front page of the May 4, 1857 issue of the Nebraska Advertiser founded by Robert Wilkinson Furnas, in Brownville, Nebraska Territory
The Massachusetts Bay Colony
Territorial changes of Kansas
Site No. JF00-072: The Nebraska–Kansas state line at the intersection of Nebraska counties Thayer and Jefferson and Kansas counties Washington and Republic
French settlements and forts in the so-called Illinois Country, 1763, which encompassed parts of the modern day states of Illinois, Missouri, Indiana and Kentucky)
Map of the territory of Nebraska and seal of the Nebraska Territory
A 1775 map of the German Coast, a historical region of present-day Louisiana located above New Orleans on the eastern bank of the Mississippi River
Vandalia was the name of a proposed British colony located south of the Ohio River, primarily in what is now the U.S. states of West Virginia and eastern Kentucky
A proposal for the creation of Westsylvania was largely deterred by the Revolutionary War
National Atlas map of United States territorial acquisitions
Seward's Folly. The controversial purchase of Alaska from Russia in 1867 turned out to be a great deal for the U.S. when the area proved to contain a treasure trove of natural resources.
The Oregon Country. The dispute over Oregon, between Britain and the U.S., led to an uneasy, parallel governing of the territory for almost 30 years.
Progression of the Indian Territory separation from the Arkansaw Territory, 1819–1836
Indiana lands acquired through treaties
The first state cessions. The 13 original states ceded their western claims to the federal government, allowing for the creation of the country's first western territories and states.
The Northwest Territory was a large and (at times) ill-defined territory ceded by Great Britain to the U.S. at the end of the Revolutionary War. British troops still occupied parts of the area well past 1800.
United States territorial expansion since 1803, maps by William R. Shepherd (1923)
Census Bureau map depicting territorial acquisitions and effective dates of statehood
The Ohio Country, indicating battle sites between settlers and Native American Tribes, 1775–1794
Selected tract purchases of western New York State
Map of the Ohio Lands
Oklahoma Territory and Indian Territory, along with No Man's Land (also known as the Oklahoma Panhandle). The division of the two territories is shown with a heavy purple line. Together, these three areas would become the State of Oklahoma in 1907.
Pennsylvania land purchases from Native Americans
Post-Civil War military districts were set up to aid in the repatriation process of the southern states during Reconstruction.
The Panama Canal Zone was once a territory of the United States
The boundaries of the State of Deseret, as proposed in 1849
Animated map of secession and repatriation of the Confederacy, 1860–1870
The proposed State of Superior. The red areas show the counties of the Upper Peninsula that are generally accepted as being part of the proposed state. The pink areas show the counties of the "expanded" proposal.
The failed State of Lincoln, with its proposed 1868 boundaries
The Philippines was a commonwealth of the United States, 1935–1946
Worldwide location of current U.S. insular areas:
The Commonwealth of Puerto Rico

The Territory of Kansas was an organized incorporated territory of the United States that existed from May 30, 1854, until January 29, 1861, when the eastern portion of the territory was admitted to the Union as the free state of Kansas.

- Kansas Territory

The Territory of Nebraska was an organized incorporated territory of the United States that existed from May 30, 1854, until March 1, 1867, when the final extent of the territory was admitted to the Union as the State of Nebraska.

- Nebraska Territory

This act established both the Nebraska Territory and Kansas Territory.

- Kansas Territory

The Colorado Territory was formed February 28, 1861 from portions of the territory south of 41° N and west of 102°03′ W (25° W of Washington, D.C.) (an area that includes present-day Fort Collins, Greeley and the portions of Boulder north of Baseline Road, in addition to portions of Kansas Territory, New Mexico Territory, and Utah Territory).

- Nebraska Territory

Territory of Kansas (1854–1861) preceded by unorganized territory of the original Louisiana Purchase. Part became the modern State of Kansas; the western part became part of the Colorado Territory.

- Historic regions of the United States

Territory of Nebraska (1854–1867) preceded by unorganized territory of the original Louisiana Purchase; split into the State of Nebraska, the Dakota Territory, additions to the Idaho Territory and additions to the Colorado Territory.

- Historic regions of the United States

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The Colorado Territory as drawn in 1860 from the Utah, Nebraska, Kansas, and New Mexico Territories. Colorado appears to have a rectangular border at this scale, but there are in fact some slight deviations from a straight line along its southern border.

Colorado Territory

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The Colorado Territory as drawn in 1860 from the Utah, Nebraska, Kansas, and New Mexico Territories. Colorado appears to have a rectangular border at this scale, but there are in fact some slight deviations from a straight line along its southern border.
The Colorado Territory as drawn in 1860 from the Utah, Nebraska, Kansas, and New Mexico Territories. Colorado appears to have a rectangular border at this scale, but there are in fact some slight deviations from a straight line along its southern border.

The Territory of Colorado was an organized incorporated territory of the United States that existed from February 28, 1861, until August 1, 1876, when it was admitted to the Union as the State of Colorado.

East of the Continental Divide, the new territory included the western portion of the Kansas Territory, as well as some of the southwestern Nebraska Territory, and a small parcel of the northeastern New Mexico Territory.