Grayson County is a county located in the U.S. state of Kentucky. As of the 2010 census, the population was 25,746. Its county seat is Leitchfield. The county was formed in 1810 and named for William Grayson (1740-1790), a Revolutionary War colonel and a prominent Virginia political figure. Grayson County was formerly a prohibition or dry county, but Leitchfield allowed limited alcohol sales in restaurants in 2010 and voted "wet" in 2016.

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.

Cave City is a home rule-class city in Barren County, Kentucky, in the United States. The population was 2,240 at the 2010 census. It is part of the Glasgow Micropolitan Statistical Area.

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.