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Louisiana Purchase
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Map of the United States highlighting the Louisiana Purchase territory in orange, showing the land acquired from France in 1803. The shaded area spans from the Mississippi River westward, covering parts or all of present-day Arkansas, Missouri, Iowa, Oklahoma, Kansas, Nebraska, and portions of Minnesota, North Dakota, South Dakota, New Mexico, Texas, Montana, Wyoming, Colorado, and a small part of Louisiana including New Orleans. Current state and international boundaries are outlined.
The impact of the Louisiana Purchase on the U.S.
Antique 1718 map by Nicolas de Fer showing the Mississippi River and surrounding Louisiana region, with illustrated rivers, lakes, settlements, and decorative cartouches. Plan of New Orleans Cession of Louisiana Hoisting American Colors, Louisiana Cession Louisiana Purchase Map of the United States highlighting the Louisiana Purchase territory in tan, spanning the central part of the country from the Gulf of Mexico northward, bordered by British Territory to the northwest, Spanish Territory to the southwest, and Spanish Florida to the southeast. Eastern U.S. states and the Great Lakes are labeled, with a compass rose in the lower left corner.
The presidency of James Monroe and the famous Monroe Doctrine
Learn how the opening of the Louisiana Territory led to mass migrations in the U.S.
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Louisiana Purchase summary
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Map of the United States highlighting the Louisiana Purchase territory in orange, showing the land acquired from France in 1803. The shaded area spans from the Mississippi River westward, covering parts or all of present-day Arkansas, Missouri, Iowa, Oklahoma, Kansas, Nebraska, and portions of Minnesota, North Dakota, South Dakota, New Mexico, Texas, Montana, Wyoming, Colorado, and a small part of Louisiana including New Orleans. Current state and international boundaries are outlined.
Louisiana Purchase Map showing the land acquired by the United States through the Louisiana Purchase in 1803.

Louisiana Purchase

United States history
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•History

Louisiana Purchase, western half of the Mississippi River basin purchased in 1803 from France by the United States; at less than three cents per acre for 828,000 square miles (2,144,520 square km), it was the greatest land bargain in U.S. history. The purchase doubled the size of the United States, greatly strengthened the country materially and strategically, provided a powerful impetus to westward expansion, and confirmed the doctrine of implied powers of the federal Constitution....

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