Hampton National Historic Site, in the Hampton area north of Towson, Baltimore County, Maryland, preserves a remnant of a vast 18th-century estate, including a Georgian manor house, gardens, grounds, and the original stone slave quarters. The estate was owned by the Ridgely family for seven generations, from 1745 to 1948. The Hampton Mansion was the largest private home in America when it was completed in 1790 and today is considered to be one of the finest examples of Georgian architecture in the United States. Its furnishings, together with the estate's slave quarters and other preserved structures, provide insight into the life of late 18th-century and early 19th-century landowning aristocracy. In 1948, Hampton was the first site selected as a National Historical Site for its architectural significance by the U.S. National Park Service. The grounds were widely admired in the 19th century for their elaborate parterres or formal gardens, which have been restored to resemble their appearance during the 1820s. Several trees are more than 200 years old.
The mansion and grounds are open to visitors, as are the overseer's house and slave quarters. Unlike most plantations, Hampton retains its original slave quarters.
History 18th century The property was originally part of the Northampton land grant given to Col. Henry Darnall (c. 1645–1711), a relative of Lord Baltimore, in 1695. His heirs sold the land on April 2, 1745, to Col. Charles Ridgely (1702–72), a tobacco farmer and trader. The bill of sale records that the property included "... houses, tobacco houses (tobacco barns), stables, gardens, and orchards."
By the late 1750s, Hampton extended to more than and included an ironworks. His son, Capt. Charles Ridgely (1733–90), expanded the family business considerably to include gristmills, apple orchards, and stone quarries. During the American Revolutionary War, the ironworks was a significant source of income for the Ridgelys, producing cannons and ammunition for the Continental Army. In 1783, Capt. Ridgely began construction of the main house, Hampton Mansion. He said its concept was inspired by Castle Howard in England, owned by relatives of his mother. When it was completed in 1790, the Hampton Mansion was the largest private home in the United States.
When Capt. Ridgely died that same year, his nephew, Charles Carnan Ridgely (1760–1829), became the second master of Hampton. He had of irrigation pipes laid in 1799 from a nearby spring to provide water to the Mansion and the surrounding gardens, which he was extensively developing. Prominent artisans were hired to design geometric formal gardens, which were planted on the Mansion's grounds between 1799 and 1801. An avid horseman, Charles Carnan began raising thoroughbred horses and installed a racetrack. A 1799 advertisement promoted the stud services of his racehorse, Grey Medley. Another of Ridgely's racehorses, Post Boy, won the Washington City Jockey Club cup.McKee, pp. 18–19.
19th century Under Charles Carnan Ridgely, Hampton reached its peak of in the 1820s. The mansion overlooked a grand estate of orchards, ironworks, coal mining, marble quarries, mills, and mercantile interests. The vast farm produced corn, beef cattle, dairy products, hogs, and horses. More than 300 enslaved people worked the fields and served the household, making Hampton one of Maryland's largest slaveholding estates. Six parterres were designed on three terraced levels facing the mansion, planted with roses, peonies, and seasonal flowers. In 1820, an orangery was built on the grounds.
Charles Carnan Ridgely frequently entertained prominent guests in the Mansion's 51 ft. x 21 ft. (16 m by 6.4 m) Great Hall, such as Charles Carroll of Carrollton, who was a signer of the Declaration of Independence, and Revolutionary War general, the Marquis de Lafayette. Charles Carnan served as governor of Maryland between 1816–19. When Governor Ridgely died in 1829, he freed Hampton's enslaved people in his will.
The Hampton estate was split among various heirs, with his son, John Carnan Ridgely inheriting the mansion and . The ironworks closed and thereafter the Ridgelys' income was primarily derived from farming, investments, and their stone quarries. John Carnan added plumbing, heating, and gas lighting to the mansion.
Eliza Ridgely John's wife and the subject of Thomas Sully's famous portrait, Lady with a Harp, purchased many artworks and furnishings for the mansion. She was a noted horticulturist and had successively larger and more elaborate gardens cultivated on the grounds, with a large variety of flowers and shrubs grown in the estate's greenhouses and tended by some of the 60 enslaved people purchased by John Carnan Ridgely.McKee, p. 67. By the mid-19th century, the Hampton estate had one of the most extensive collections of citrus trees in the U.S., along with various exotic trees and plants gathered by Eliza Ridgely during her frequent travels to Europe and the Orient. In the warm months, the potted citrus plants were brought outside and arranged around the terraced gardens, then taken into the heated orangery during the winter. She had one section of the garden planted with colorful red, yellow, pink, and maroon coleus from Asia. In 1859, Hampton's fame for lavish style was such that the author of a book on landscaping wrote, "It has been truly said of Hampton that it expresses more grandeur than any other place in America". In January 1861, shortly after the election of Abraham Lincoln as President of the United States, Charles Ridgely (the son of John Carnan and Eliza Ridgely) formed the pro-Confederate Baltimore County Horse Guards at Hampton with himself as captain of the militia unit that he described as "states' rights gentlemen." One of his militia's cavalry men, Lieut. John Merryman, was subsequently arrested by the Union Army and imprisoned in May 1861 on a charge of treason, sparking the landmark U.S. Supreme Court case, Ex parte Merryman. As the Civil War raged across the farmlands of Maryland and Pennsylvania at the Battle of Antietam (1862) and the Battle of Gettysburg (1863), the Ridgelys' Hampton estate remained untouched.
Although Maryland, as a border state, was exempted from Lincoln's Emancipation Proclamation, the Maryland General Assembly eliminated slavery in 1864. With the end of slavery, Hampton began to decline. A number of the former enslaved people continued to work at Hampton as paid household servants but the Ridgelys had to hire other hands to work the farm. With the deaths of John and Eliza in 1867, their son Charles became the next master of Hampton. The mansion and the remaining were subsequently inherited upon Charles' death in 1872 by Captain John Ridgely Prominent guests, including Theodore Roosevelt, continued to visit Hampton and enjoy its grounds.
20th century
As nearby Baltimore grew and local agriculture declined, the Ridgelys found it increasingly difficult to maintain the property. Five of the six parterres were removed and replanted as a grass lawn. Some income was generated by producing cider from the estate's apple orchards and operating a dairy. In 1929, Capt. John Ridgely and his son, John Ridgely Jr., formed the Hampton Development Corporation and sold some of the remaining of land. In 1938, John Ridgely, Jr. (1882–1959) became the sixth generation of the family to become master of Hampton. His company sold off large portions of the estate to a suburban housing development in the 1930s and 1940s, now known as the fashionable Hampton residential community.McKee, p. 63. The Hampton Mansion remained in the Ridgely family until 1948, when John Ridgely Jr. moved to the smaller Farm House on the property and the Mansion was acquired by the Avalon Foundation (now part of the Andrew W. Mellon Foundation).McKee, pp. 62 and 105. The seventh and last generation of Ridgelys to live at the mansion was his son, John Ridgely III , who, after marrying Lillian Ketchum in the mid-1930s, continued to reside at the mansion with his wife until they both entered Army service during World War II.McKee, pp. 90–92.
The Hampton Mansion and remaining of the Ridgely estate were designated a National Historic Site by the Secretary of the Interior on June 22, 1948—the first site to be so selected on the basis of its historical significance and "outstanding merit as an architectural monument".McKee, pp. 7 and 105. Hampton Mansion was opened to the public in May 1949 under the care of Preservation Maryland for the next thirty years (1949–79). Work also began in 1949 to restore four of the site's six 19th-century parterres. On October 15, 1966, Hampton was listed on the National Register of Historic Places. In October 1979, it was acquired by the National Park Service (NPS), which has operated and managed the estate since.McKee, p. 105. The NPS subsequently acquired additional acreage containing original Ridgely structures, bringing the park to its present size. In 1998, the NPS stated its purpose for the historic site:
21st century
As part of the General Management Plan adopted by the NPS in 1998 for the estate's long-term planning and operation, the NPS began studying the mansion's security, safety, electrical systems, and environmental issues in 2000. Critical needs were identified, such as the lack of a fire suppression system and climate control. Conservators of the property's furnishings and paintings said that the need to stabilize temperature and humidity levels inside the mansion was "urgent due to unacceptable environmental stress". The NPS finalized plans in 2004, including an environmental impact assessment, for installation of a modern HVAC system and a concealed fire sprinkler system to protect the historic mansion and its irreplaceable contents from loss by fire.
Starting in January 2005, the mansion closed for almost three years as it underwent the major restoration project. As part of the 2005–07 renovations, the drawing room and two bedchambers were completely refurbished. The drawing room's furnishings were extensively researched to reflect accurately the Mansion in the 1830–60 period. The ornate cupola atop the mansion was restored, including the spherical ornament above the cupola, which was refinished in gold leaf. The Hampton Mansion re-opened to the public on November 30, 2007.
The Park Service's chief ranger for the Hampton National Historic Site said afterwards of the $3 million in renovations, "I don't think the mansion has ever looked better". "Preservation Maryland", a statewide preservation advocacy organization, conferred its Stewardship Award in 2007 on the Hampton National Historic Site for refurnishing the mansion's rooms with historical accuracy while unobtrusively installing the fire suppression and climate control systems.
After an order by President Donald Trump to eliminate diversity, equity and inclusion efforts led National Park Service officials to scrub many mentions of the accomplishments of LGBT+ people, women and people of color from its webpages, historians worried the same fate would befall Hampton National Historic Site's website and undo years of efforts to document the lives of the enslaved people who lived there and the role the Ridgely family played in segregation. As of 12 November 2025, visitors can still read ″Stories of the Enslaved″ and ″Free Black Laborers″ on the park′s website.
National Park Service management