Bullitt County is a county located in the north central portion of the U.S. state of Kentucky. As of the 2010 census, the population was 74,319. The county seat is Shepherdsville. The county was founded in 1796.Located just south of the city of Louisville, Bullitt County is included in the Louisville/Jefferson County, KY-IN Metropolitan Statistical Area, commonly known as Kentuckiana. The western fifth of the county (62 sq. miles/40,000 acres (160 km2)) is part of the United States Army post of Fort Knox and is reserved for military training.

Elizabethtown is a home rule-class city and the county seat of Hardin County, Kentucky, United States. The population was 28,531 at the 2010 census, and was estimated at 30,289 by the U.S. Census Bureau in 2019, making it the 11th-largest city in the state. It is included in (and the principal city of) the Elizabethtown–Fort Knox, Kentucky Metropolitan Statistical Area, which is included in the Louisville/Jefferson County–Elizabethtown–Madison, Kentucky-Indiana Combined Statistical Area. The Elizabethtown Metropolitan area had a 2019 estimated population of 153,057, making it the 5th largest metropolitan area in the state.

Fort Knox is a United States Army installation in Kentucky, south of Louisville and north of Elizabethtown. It is adjacent to the United States Bullion Depository, which is used to house a large portion of the United States' official gold reserves, and with which it is often conflated. The 109,000-acre (170 sq mi; 440 km2) base covers parts of Bullitt, Hardin and Meade counties. It currently holds the Army Human Resources Center of Excellence, including the Army Human Resources Command. It is named in honor of Henry Knox, Chief of Artillery in the American Revolutionary War and the first United States Secretary of War. For 60 years, Fort Knox was the home of the U.S. Army Armor Center and the U.S. Army Armor School, and was used by both the Army and the Marine Corps to train crews on the American tanks of the day; the last was the M1 Abrams main battle tank. The history of the U.S. Army's Cavalry and Armored forces, and of General George S. Patton's career, is shown at the General George Patton Museum on the grounds of Fort Knox. In 2011, the U.S. Army Armor School moved to Fort Benning, Georgia, where the Infantry School is also based. In 2014, the U.S. Army Cadet Command relocated to Fort Knox and all summer training for ROTC cadets now takes place there.

Shelby County is a county located in the U.S. state of Kentucky. As of the 2010 census, the population was 42,074. The county seat is Shelbyville. The county was founded in 1792 and named for Isaac Shelby, the first Governor of Kentucky. Shelby County is part of the Louisville/Jefferson County, KY–IN Metropolitan Statistical Area. Shelby County's motto is "Good Land, Good Living, Good People". The County Judge/Executive is Dan Ison.