Fort Leavenworth ZIP Code List — Leavenworth County, KS
There is one unique ZIP code in Fort Leavenworth, Kansas and it is 66027. Area code: 913.
1
ZIP codes
9.29
sq mi land
0.50
sq mi water
913
area code
Fort Leavenworth, KS ZIP code map
About Fort Leavenworth, KS
Fort Leavenworth is a historic military community located in Leavenworth County, Kansas, and is served by a single ZIP code: 66027. As one of the oldest active U.S. Army installations west of the Mississippi River, Fort Leavenworth carries enormous historical and strategic significance for the nation's military heritage. The community sits along the western bank of the Missouri River and functions as a self-contained federal enclave within the broader Leavenworth, Kansas metropolitan area.
Location & geography
Fort Leavenworth is situated in northeastern Kansas, approximately 25 miles northwest of Kansas City, Kansas, and directly adjacent to the city of Leavenworth to the south. The installation lies along the Missouri River, which forms its eastern boundary and contributes to a total water area of 0.50 square miles within its limits. The terrain consists largely of rolling bluffs and wooded areas characteristic of the Missouri River Valley, giving the installation a distinctive landscape that differs from the flatter plains found deeper in the state.
Community & economy
Life in Fort Leavenworth revolves almost entirely around the U.S. Army, with the installation serving as home to active-duty military personnel, their families, and a significant civilian workforce supporting base operations. The Command and General Staff College, located on the installation, draws military officers from across the United States and dozens of foreign nations, giving the community a uniquely international and academically oriented character. Daily life on post includes access to on-base amenities such as commissaries, schools, recreational facilities, and chapels, creating a close-knit and self-sufficient residential environment.
Transportation
Fort Leavenworth is accessible via U.S. Highway 73, which runs through the city of Leavenworth and connects the installation to the broader regional road network. Kansas State Highway 5 also provides access to the surrounding area and links residents to nearby communities. The nearest major commercial airport is Kansas City International Airport (MCI), located approximately 30 miles to the southeast, offering convenient access to national and international destinations for military personnel and civilian staff.
History
Fort Leavenworth was established in 1827 by Colonel Henry Leavenworth as a frontier outpost designed to protect trade along the Santa Fe Trail, making it one of the oldest continuously operating military installations in the United States. Throughout the 19th century, it served as a critical staging ground for westward expansion, and the famous Frontier Army Museum on the post preserves much of this storied past. In the 20th century, the installation took on its modern identity as the intellectual center of the U.S. Army, housing the Command and General Staff College, which has educated military leaders for generations.
Did you know?
Fort Leavenworth is home to the United States Disciplinary Barracks, the only maximum-security military prison in the country, which has operated on the installation for over a century. Despite its relatively compact land area of just 9.29 square miles, Fort Leavenworth has shaped U.S. military doctrine and strategy on a global scale through the officers educated at its renowned staff college.
