The following historic sites are part of Loudoun's heritage.

Belmont. Ludwell Lee constructed Belmont, a Federal plantation house, in 1799, and after serving as aide-de-camp to Lafayette in 1781, Lee hosted Lafayette at Belmont in 1825. Belmont is currently under renovation for future use as a country club.

The Broad Run Bridge and tollhouse were part of the Leesburg turnpike and the Georgetown turnpike, toll roads created in the early 1800s to improve transportation in the area. The bridge became unused after the construction of a modern bridge in 1949, and was destroyed by Hurricane Agnes in 1972. However, the tollhouse remains at the intersection of Route 7 and 28 as a private residence.

The Catoctin Creek Bridge is located on Route 662 near Waterford after relocation in 1932 from its original location on Route 7. One of the last through-truss metal bridges in Northern Virginia, it is an example of Pratt truss construction.

Clapham's Ferry has been the site of a Potomac River ferry crossing since 1757, when Josias Clapham gained permission to operate a ferry to provide the public with passage to Maryland. It remained operational until the Civil War.

Dodona Manor was partially constructed by George Washington Ball, a great-nephew of George Washington. George C. Marshall purchased the house in 1941 and lived there until his death in 1959. Dodona Manor was also used as a retreat during WWII. Open to the public Monday through Saturday 10 a.m.-4 p.m.

Douglass High School was the only black high school from its opening in 1941 until 1968 and desegregation. The building's construction was paid for with public funds, but additional needs such as furniture, lab equipment and musical instruments were purchased with money raised by Loudoun County's African American citizens. Today it serves as a school and a community center.

Fleetwood Farm was the home of William Ellzey, who contributed to the Revolution by signing the Loudoun County Resolves for Independence. Ellzey resided there from 1761 to 1795.

The Goose Creek Stone Bridge is the oldest stone turnpike bridge in Virginia. 212 feet long, it is located near Atoka and is maintained by the Fauqier and Loudoun Garden Club.

Janelia was built in 1936 for author Robert S. Pickens and his wife. A combination of the 1920s Normandy Manor style and the 1930s Modernist style of architecture, it represents the lifestyle of the wealthy preceding WWII. The property is currently being developed.

Lucketts School was built in 1913, originally consisting of four classrooms without electricity or indoor plumbing. Although it closed as a school in 1972, it is still a landmark of Lucketts and it is maintained by the Loudoun County Department of Parks, Recreation and Community Services.

Morven Park was originally built in the 1780s as a farmhouse, but went through many renovations and additions. Westmoreland Davis, who was governor of Virginia from 1918 to 1922, transformed Morven Park into a dairy farm. Open to the public April to October 12-5 p.m. Tuesday through Friday, 10 a.m.-5 p.m. on Saturday and 1-5 p.m. on Sunday.

Oak Hill was constructed beginning in the early 1820s with collaboration from Thomas Jefferson, James Hoban, architect of the White House, and the owner, President James Monroe. Today the house is still a private residence.

Oatlands was developed by George Carter starting in 1803. The daughters of William Corcoran Eustis, who acquired Oatlands in 1902, presented the estate to the National Trust for Historic Preservation in 1965. Open to the public late March through December, Monday through Saturday 10 a.m.-4:30 p.m. and Sunday 1-4:30 p.m.

Old Stone Church Archeological Site was the first property owned by Methodists in America and became the first Methodist meeting house in Virginia. It was home to a biracial congregation and many famous Methodist evangelists. After two lawsuits regarding ownership, the church was finally taken apart in 1902. Today the site is believed to contain important artifacts.

The Red Fox Inn dates from the 1940s, but its site has been used as a tavern since the 1700s. Open to the public, it is currently a restaurant and an inn in Middleburg.

Rockland was built by General George Rust in 1822. The property was passed on to his son, Colonel Armistead T. M. Rust, who was a part of the 19th Virginia Infantry during the Civil War. Today the Rust family still owns the mansion.

Rokeby was constructed in 1757 by Charles Binns II, the first clerk of the circuit court of Loudoun County. It has been said that several important documents, including the Declaration of Independence, the Constitution and the Articles of Confederation were stored at Rokeby during the British occupation of Washington in 1814.