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. Over 2.6 million people came to Omaha to view the 4,062 exhibits during the five months of the Exposition. President William McKinley and William Jennings Bryan were among the dignitaries who attended at the invitation of Gurdon Wattles, the event's leader. 100,000 people assembled on the plaza to hear them speak. The Expo stretched over a 180-acre (0.73 km2) tract in North Omaha and featured a 2,000 feet (610 m)-long lagoon encircled by 21 classical buildings that featured fine and modern products from around the world.
|Trans-Mississippi and International Exposition|
|Name||Trans-Mississippi and International Exposition|
|Country||United States of America|
|Opening||June 1, 1898|
|Closure||November 1, 1899|
One reporter wrote, "Perhaps the candid Nebraskan would tell you in a moment of frank contriteness that the prime object of this exposition was to boom Omaha."
The decision to hold [an] Exposition was made in late 1895 by a small committee of Omaha businessmen determined to hold the Expo, led by banker Gurdon Wattles. In making their decision, the committee set aside several sites for consideration, including an area near 16th Avenue and Pershing Drive in East Omaha, near the now-dry Florence Lake. It was the preferred site for the Exposition early in 1897. 400 acres (1.6 km2) surrounding the tract that became Miller Park was considered the strongest contender towards the middle of the year. However, both sites ended up losing out to a site in North Omaha later in the year when Omaha banker Herman Kountze donated land in his Kountze Place development to the City of Omaha. After the Expo some of that land would become Kountze Park.
During the Expo, on August 31, 1898, the committee declared "Cody Day" in honor of Buffalo Bill Cody. Cody brought his "world-famous" Wild West Show back to the Omaha Driving Park where it was formally founded several years earlier.
The total attendance was 2,613,508, and the total receipts were $1,924,077. The following year after the Expo some members of its managing committee decided to host another Expo-type event, which became the Great American Exposition in summer 1899.
Many temporary buildings, structures, and features were installed for the Exposition. Thomas Rogers Kimball and C. Howard Walker were named co-architects-in-chief for the event. The two men were responsible for the overall site development, including perimeter buildings. They designed several major buildings, some smaller structures and the Arch of States, which was a main entrance.
All these structures were temporary by design, built at about half the cost of permanent buildings. The lower cost allowed the construction of larger structures. The construction of the hundreds of temporary buildings at the Expo was notable because of the almost exclusive usage of a new, cheap and pliable building material called staff. It allowed Expo designers to construct visual reproductions of Grecian and Roman temples, fine European buildings, and more. The buildings were constructed of strips of wood covered with staff.
The Grand Court of the 1898 Trans-Mississippi Exposition was located on the current site of Kountze Park.
The Post Office Department issued a series of nine postage stamps to mark the Exposition, each depicting a Western scene. Now known as the Trans-Mississippi Issue and considered among the finest stamps produced by the US, they are highly prized by collectors; a complete unused set is worth about US$5,000. The stamps were reissued in 1998 for a limited time. 
A monument to the exposition was placed in Omaha's Kountze Park, the former site of the exposition, during a Centennial celebration of the Trans-Mississippi and International Exposition in 1998.
- Richard Bock - World-famous sculptor who designed several buildings at the Expo.
- Trans-Mississippi Exposition Parade."[Usurped!] Nebraska State Historical Society. Retrieved 2/6/08.
- Larsen, L. and Cottrell, B. (1997) The Gate City: A History of Omaha. University of Nebraska Press. p. 43.
- "When the World Came to Omaha."
- Trans-Miss Expo Construction Timeline
- (1989) Locating the Exposition Archived 2006-09-26 at the Wayback Machine Omaha Public Library.
- Peterson, J. (1999) Omaha railroad Stations.
- Buffalo Bill at the Trans-Mississippi and International Exposition and Indian Congress of 1898[Usurped!]. Nebraska State Historical Society.
- "Mr. McKinley on the war", The New York Times. October 13, 1898. Retrieved 4/21/08.
- New International Encyclopedia. 1905. .
- (n.d.) Great American Exposition Notes
- Thomas Rogers Kimball. Nebraska Social Studies Association. Retrieved 4/8/08.
- "#3209 - 98 1¢ - $2 Trans-Mississippi Set - sheet of 9".
- Trans-Mississippi & International Exposition University of Nebraska-Lincoln's collected Digital Archive on the event
- Trans Mississippi & International Exposition The Omaha Public Library's Page on the Exposition
- Trans-Mississippi Exposition Omaha, Nebraska, 1898 Trans-Mississippi Exposition Omaha, Nebraska, 1898