United States Army Command and General Staff College

The Combined Arms Research Library (CARL) at Fort Leavenworth, Kansas is a United States Army library that supports the United States Army Command and General Staff College. Its collection of over 300,000 books covers all aspects of military science: joint and combined operations; tactics and doctrinal development; leadership, intelligence, weapons, equipment, and training. The Archives and Special Collections house a unique collection of over 200,000 items and the documents collection consists of another 250,000. Each year, the CARL reference staff answers some 30,000 queries for soldiers, faculty and staff at Fort Leavenworth, Kansas and throughout the world via the Defense Digital Library Reference Service. Scholars, writers and the DoD community use the Combined Arms Research Library's archival materials, extensive research materials, and historical documents. The Combined Arms Research Library is one of the largest and most well respected libraries in the Army and was named the 2007 Federal Library of the Year by the Federal Library and Information Center Committee (FLICC).

The U.S. Army Combined Arms Center (USACAC) is located at Fort Leavenworth and provides leadership and supervision for leader development and professional military and civilian education; institutional and collective training; functional training; training support; battle command; doctrine; lessons learned and specified areas the Commanding General, United States Army Training and Doctrine Command (TRADOC) designates in order to serve as a catalyst for change and to support developing relevant and ready expeditionary land formations with campaign qualities in support of the joint force commander.

The Foreign Military Studies Office, or FMSO, is a research and analysis center for the United States Army that is part of the United States Army Combined Arms Center at Fort Leavenworth. It manages the Joint Reserve Intelligence Center there.

Fort Leavenworth USD 207 is a public unified school district headquartered in Fort Leavenworth, Kansas, United States.

Fort Leavenworth () is a United States Army installation located in Leavenworth County, Kansas, in the city of Leavenworth. Built in 1827, it is the second oldest active United States Army post west of Washington, D.C., and the oldest permanent settlement in Kansas. Fort Leavenworth has been historically known as the "Intellectual Center of the Army."During the country's westward expansion, Fort Leavenworth was a forward destination for thousands of soldiers, surveyors, immigrants, American Indians, preachers and settlers who passed through. Today, the garrison supports the US Army Training and Doctrine Command (TRADOC) by managing and maintaining the home of the US Army Combined Arms Center (CAC). CAC's mission involves leader development, collective training, and Army doctrine and battle command (current and future). Fort Leavenworth is also home to the Military Corrections Complex, consisting of the United States Disciplinary Barracks – the Department of Defense's only maximum security prison – and the Midwest Joint Regional Correctional Facility. In addition, the Fort Leavenworth Garrison supports numerous tenant organizations that directly and indirectly relate to the functions of the CAC, including the United States Army Command and General Staff College and the Foreign Military Studies Office. The fort occupies 5,600 acres (2,300 ha) and has 7,000,000 square feet (650,000 m2) of floor area in 1,000 buildings and 1,500 quarters. It is located on the Frontier Military Scenic Byway (U.S. Route 69 and K-7 corridor), which was originally a military road connecting to Fort Scott and Fort Gibson. Fort Leavenworth was also the base of African-American soldiers of the U.S. 10th Cavalry Regiment of the United States Army, formed on 21 September 1866 at Fort Leavenworth. They became known as Buffalo Soldiers, nicknamed by the Native American tribes whom they fought. The term eventually was applied to all of the African-American regiments formed in 1866.

The Centennial Bridge is a through arch bridge road bridge over the Missouri River connecting Leavenworth, Kansas, and Platte County, Missouri. Constructed in 1955, it was initially a toll bridge. The bridge opened in 1955, a year after Leavenworth celebrated its centennial as the first city incorporated in Kansas. It is a two-span arch bridge connecting K-92 and Missouri Route 92. Its main span is 419.8 feet, and its total length is 2,571.2 feet. During the construction a spur of Route 45 called the "Leavenworth cutoff" was built to speed traffic to Kansas City, Missouri. The two-mile spur, even though it is in Missouri, was maintained by the city of Leavenworth until the tolls were removed from the Centennial Bridge in May 1977. The bridge is now maintained by the Kansas Department of Transportation.

Fort Leavenworth National Cemetery is a United States National Cemetery located on Fort Leavenworth, a United States Army installation north of Leavenworth, Kansas. It was officially established in 1862, but was used as a burial ground as early as 1844, and was one of the twelve original United States National Cemeteries designated by Abraham Lincoln. The cemetery is the resting place of nine Medal of Honor recipients, but most are the less famous casualties of war. It was named for Brigadier General Henry Leavenworth, who was re-interred there in 1902 from Woodland Cemetery in Delhi, New York. Administered by the United States Department of Veterans Affairs, it occupies approximately 36.1 acres (14.6 ha) and was site to over 22,00 interments, as of 2020. It is maintained by Leavenworth National Cemetery.

The Richard Allen Cultural Center opened in 1992 to highlight African-American history in Leavenworth, Kansas. In 1992, the museum opened in the former home of U.S. Army Captain William Bly, a Buffalo Soldier during World War I. The home is decorated to look as it would have in the early 1900s. In 2002, an addition was built to the front of the original home to display more items teaching about African-American history in Kansas. One display includes prints of original photographic plate negatives donated to the museum, called the Black Dignity Photos from the Mary Everhard collection. The photographs are African-American pioneers who lived in and around the Leavenworth area from 1870s to 1920s. Other items include military artifacts from African-American soldiers who served on Fort Leavenworth, including Colin Powell. The Richard Allen Cultural Center also contains a Ku Klux Klan costume and photographs depicting KKK activities in Leavenworth. One artifact is a news article discussing the public lynching of an African-American citizen of Leavenworth, Fred Alexander. The Richard Allen Cultural Center seeks to preserve these pieces of Leavenworth, Kansas history so that they are not forgotten. In 2016 a bronze bust of Cathay Williams, featuring information about her and with a small rose garden around it, was unveiled outside the Richard Allen Cultural Center.

Leavenworth () is the county seat and largest city of Leavenworth County, Kansas, United States and is part of the Kansas City metropolitan area. As of the 2020 census, the population of the city was 37,351. It is located on the west bank of the Missouri River. The site of Fort Leavenworth, built in 1827, the city became known in American history for its role as a key supply base in the settlement of the American West. During the American Civil War, many volunteers joined the Union Army from Leavenworth. The city has been notable as the location of several prisons, particularly the United States Disciplinary Barracks and United States Penitentiary, Leavenworth.

Sherman Army Airfield (IATA: FLV, ICAO: KFLV) is a joint use civilian-military airport located at Fort Leavenworth, Kansas, in Leavenworth County, Kansas. The airport is located on the United States Army post, but the city of Leavenworth, Kansas, has an agreement providing for civilian use at all times without prior notice or permission. Civilian use of the airfield far exceeds military use 93% to 7% as of the end of 2019.It derives its codes from Fort Leavenworth. While many facilities at Fort Leavenworth are named for the Command and General Staff College founder William Tecumseh Sherman the airfield is actually named for an early Army Aviation pioneer, Major William Carrington Sherman (1888–1927), who died in 1927 at Ft. Leavenworth while there as an instructor. William Sherman wrote the Army's first airplane tactics manual, Air Tactics (1921), as well as several other army airplane manuals and histories.

Leavenworth USD 453 is a public unified school district headquartered in Leavenworth, Kansas, United States.

The United States Penitentiary, Leavenworth (USP Leavenworth) is a medium security U.S. penitentiary in northeast Kansas. It is operated by the Federal Bureau of Prisons, a division of the United States Department of Justice. It also includes a satellite federal prison camp (FPC) for minimum-security male offenders. USP Leavenworth is located in Leavenworth, Kansas, which is 25 miles (40 km) northwest of Kansas City, Kansas.