Oak Hill is a mansion and plantation located in Aldie, Virginia that was for 22 years a home of Founding Father James Monroe, the fifth U.S. President.

It is located approximately 9 miles (14 km) south of Leesburg on U.S. Route 15, in an unincorporated area of Loudoun County, Virginia.

[6] It is suggested that Thomas Jefferson, his close friend, may well have drawn plans for Oak Hill; the construction was supervised by James Hoban, designer and builder of the White House.

However, Monroe continued to live primarily at Highland, his residence in Albemarle County—until 1826, when he was forced to sell that property to pay debts he had incurred while serving as president.

For sale on Thursday, the 21st of December next on the premises, the tract of LAND on which the late Judge Jones resided in Loudoun County with about 25 slaves, and the stock of Horses, Cattle, and Hogs, on the estate.

The tract contains nearly 2000 acres [8 km2], and possesses many advantages which entitle it to the attention of those who may wish to reside, in that highly improved part of our country.

The above lands, being yet unsold, notice is given that they will be disposed of, by private sale, upon terms which will be made known on application to Israel Lacy Esq.

The property passed out of the hands of John Fairfax after the war, but was later repurchased by his eldest son, Henry, a civil engineer and state senator.

The mansion was enlarged by the addition of two wings in 1922 while owned by Frank C. Littleton and his wife, but the central facade looks much as it did during Monroe's lifetime.

In November 2023, the owners of Oak Hill sent a letter to Charles F. Sams III, Director of the National Park Service, requesting the agency to "explore the suitability of designating Oak Hill, the former home of President James Monroe located in Loudoun County, Virginia, as a unit of the National Park System."