St. Thaddeus Episcopal Church

The Old Aiken Post Office, located in Aiken, South Carolina, is a former United States Post Office and photography studio that now serves as an office building. The first floor of the building has been occupied by Savannah River Nuclear Solutions, LLC since December 2009 following renovations.The building was originally proposed by U.S. Representative George W. Croft in 1904. After Croft's death, his son, U.S. Representative Theodore G. Croft, continued the project. Over the years, the building has been occupied by numerous politicians, including U.S. Senator Strom Thurmond and South Carolina Senator Tom Young.

The Charles E. Simons Jr. Federal Court House is located in Aiken, South Carolina. It is significant for its association with the many federal construction programs of the Great Depression era. The building, designed by Columbia, South Carolina architects Lafaye and Lafaye, is an excellent example of a Georgian Revival building, a style often used during the 1920s and 1930s for government buildings in smaller towns. The Court House was listed in the National Register of Historic Places on December 10, 2003.The building was named for District Court judge Charles Earl Simons Jr. in 1986.

Aiken Winter Colony Historic District III, located in Aiken, South Carolina. It has 42 properties, most of which were seasonal residences. The pleasing district varies from small cottages to large estates. Architectural styles include Queen Anne, Victorian, Colonial Revival, and Classical Revival, among others. The district also includes the Aiken Preparatory School. Aiken Winter Colony Historic District III was listed in the National Register of Historic Places on November 27, 1984.

Mead Hall Episcopal School is a private, 3K–12 coeducational college preparatory school located over two campuses in Aiken, South Carolina. Previously covering grades 3K–8, the school expanded to cover high school grades when they acquired Aiken Preparatory School during the summer of 2012.

The Battle of Aiken (also known as the Action at Aiken) occurred on February 11, 1865 and was part of the Carolinas campaign. The principal commanders were Union Maj. Gen. Hugh Judson Kilpatrick and Confederate Maj. Gen. Joseph Wheeler. Wheeler was able to score a minor victory over Kilpatrick. Today, an annual re-enactment is held the final full weekend in February. As of May 2022, 28 reenactments of Aiken have been held.

The Aiken Tennis Club is a private court tennis club located at 146 Newberry Street, SW in Aiken, South Carolina. It includes the Court Tennis Building. The club was incorporated in 1898 with the sponsorship of financier and founder of the prominent Whitney family, William C. Whitney. The building was constructed around 1902 and listed on the National Register of Historic Places on November 27, 1984. The Aiken Tennis Club is the world's most equatorial court tennis (also known as "real tennis") venue, and one of only two American courts south of the Mason-Dixon line (the other is the International Tennis Club of Washington). Former world champions who have played on the court include Northrup R. Knox, G.H. "Pete" Bostwick, Jr., Jordan Toole, Jimmy Bostwick, Wayne Davies, Robert Fahey, and Camden Riviere. The most notable competition was the world championship challenger match between Ruaraidh Gunn and Camden Riviere on March 8, 2008.

The Phelps House (or Rose Hill Estate), is located in Aiken, South Carolina. The house was built in the early 1900s on the foundations of an antebellum house that had been destroyed during the Civil War. It is historically significant for several reasons, one of which is its very distinctive Shingle Style. This style, used often in the late 1800s and early 1900s in the resort homes of the rich, was rarely used in South Carolina. The large house has over 20 rooms, and the grounds include the stables, garage, greenhouses and kennels. As of 2012, the home is available for commercial purposes and due to this use, can be readily viewed and enjoyed. It was listed in the National Register of Historic Places on June 10, 1974.Today, the property is open to the public with amenities that include Overnight Accommodations, Event Venue Facilities, Catering and The Stables Restaurant.

The Legare-Morgan House is a one-story clapboard structure built in Aiken, South Carolina around 1835. From 1850 to 1859 it was the home of the artist, poet and inventor, James Mathews Legare. In 1870 the property was sold to Thomas C. Morgan. The home, located in proximity to Aiken's downtown area, was listed on the National Register of Historic Places September 22, 1977.

Willcox's, located in Aiken, South Carolina, US, was an internationally known inn during the Aiken Winter Colony heyday. Operated from 1898 to 1957 by members of the Willcox family, the still-magnificent building reflects the influence of both Second Empire and Colonial Revival styles of architecture. The plan of the building is irregular in shape, consisting of a central block with asymmetrical wings. Of Aiken's once famous resort hostelries, only Willcox's is still standing. The landmark property was listed on the National Register of Historic Places March 19, 1982.

St. Mary Help of Christians Church is a Catholic parish of the Roman Catholic Diocese of Charleston. The main parish church is at 138 Fairfield St. SE in Aiken, South Carolina. The campus also includes the historic 1905 church ("Old Saint Mary's") at the corner of Park Avenue and York Street, and Ste. Claire Chapel (1880), which sits to the left of the historic church. These two church buildings are listed on the National Register of Historic Places

Immanuel School is significant for its association with the area's parochial education of African-American children in the Aiken, South Carolina, (USA), area from 1890 to 1932. It was listed on the National Register of Historic Places in 2009.

Joye Cottage is one of the oldest, and largest winter retreats in Aiken, South Carolina. Most of the sprawling property dates to 1897, when William Collins Whitney purchased the property and remodeled it extensively. It now includes a main house, a stable, a greenhouse, a laundry house, a couple of one-story cottages, and a squash court. The property was listed on the National Register of Historic Places in 1980.