The Trans-Mississippi was the geographic area west of the Mississippi River

Mississippi River

The Mississippi River is the largest river system in North America. Flowing entirely in the United States, this river rises in western Minnesota and meanders slowly southwards for to the Mississippi River Delta at the Gulf of Mexico. With its many tributaries, the Mississippi's watershed drains...

 during the 19th century, containing the states of Arkansas

Arkansas

Arkansas is a state located in the southern region of the United States. Its name is an Algonquian name of the Quapaw Indians. Arkansas shares borders with six states , and its eastern border is largely defined by the Mississippi River...

, Louisiana

Louisiana

Louisiana is a state located in the southern region of the United States of America. Its capital is Baton Rouge and largest city is New Orleans. Louisiana is the only state in the U.S. with political subdivisions termed parishes, which are local governments equivalent to counties...

, Missouri

Missouri

Missouri is a US state located in the Midwestern United States, bordered by Iowa, Illinois, Kentucky, Tennessee, Arkansas, Oklahoma, Kansas and Nebraska. With a 2010 population of 5,988,927, Missouri is the 18th most populous state in the nation and the fifth most populous in the Midwest. It...

 and Texas

Texas

Texas is the second largest U.S. state by both area and population, and the largest state by area in the contiguous United States.The name, based on the Caddo word "Tejas" meaning "friends" or "allies", was applied by the Spanish to the Caddo themselves and to the region of their settlement in...

, and the Indian Territory

Indian Territory

The Indian Territory, also known as the Indian Territories and the Indian Country, was land set aside within the United States for the settlement of American Indians...

 (now Oklahoma

Oklahoma

Oklahoma is a state located in the South Central region of the United States of America. With an estimated 3,751,351 residents as of the 2010 census and a land area of 68,667 square miles , Oklahoma is the 28th most populous and 20th-largest state...

). The term was especially used by the Confederate States of America

Confederate States of America

The Confederate States of America was a government set up from 1861 to 1865 by 11 Southern slave states of the United States of America that had declared their secession from the U.S...

 as the designation for the theater of operations west of the Mississippi. The geographical term is generally used today only in matters relating to the study of the American Civil War

American Civil War

The American Civil War was a civil war fought in the United States of America. In response to the election of Abraham Lincoln as President of the United States, 11 southern slave states declared their secession from the United States and formed the Confederate States of America ; the other 25...

.

However, the term Trans-Mississippi was also used at times to refer to any land "across the Mississippi" or the entire western two-thirds of the United States. In 1898, a Trans-Mississippi Exposition

Trans-Mississippi Exposition

The Trans-Mississippi and International Exposition was a world's fair held in Omaha, Nebraska from June 1 to November 1 of 1898. Its goal was to showcase the development of the entire West, stretching from the Mississippi River to the Pacific Coast. The Indian Congress was held concurrently...

 was held at Kountze Park

Kountze Park (Omaha, Nebraska)

Kountze Park is an urban public park located at 1920 Pinkney Street in the Kountze Place neighborhood of North Omaha, Nebraska, in the United States, and is historically significant as the site of the Trans-Mississippi Exposition of 1898.-About:...

 in Omaha, Nebraska

Omaha, Nebraska

Omaha is the largest city in the state of Nebraska, United States, and is the county seat of Douglas County. It is located in the Midwestern United States on the Missouri River, about 20 miles north of the mouth of the Platte River...

. The postage stamp

Postage stamp

A postage stamp is a small piece of paper that is purchased and displayed on an item of mail as evidence of payment of postage. Typically, stamps are made from special paper, with a national designation and denomination on the face, and a gum adhesive on the reverse side...

s of the Trans-Mississippi Exposition Issue are considered some of the most beautiful stamps ever issued by the US, and a complete set of the "Trans-Miss" is highly prized. In 1998, a set of stamps using designs derived from the original issue was issued to commemorate its 100th anniversary.

See also

• Trans-Mississippi Theater of the American Civil War
  Trans-Mississippi Theater of the American Civil War
  The Trans-Mississippi Theater of the American Civil War was the major military and naval operations west of the Mississippi River. The area excluded the states and territories bordering the Pacific Ocean, which formed the Pacific Coast Theater of the American Civil War.The campaign classification...
  
  
• Trans-Mississippi Exposition
  Trans-Mississippi Exposition
  The Trans-Mississippi and International Exposition was a world's fair held in Omaha, Nebraska from June 1 to November 1 of 1898. Its goal was to showcase the development of the entire West, stretching from the Mississippi River to the Pacific Coast. The Indian Congress was held concurrently...