Founded in 1965 by the Summerton Baptist Church for the purpose of affording a superior elementary and secondary education in a non-denominational Christian environment, Clarendon Hall was originally known as Summerton Baptist Church School. Because of continued growth in student body curriculum, it soon became evident that a separate campus and building would be required. In 1968, Calvary Baptist Church located near Pinewood, South Carolina offered to take over control and continue operation of the school. In 1968, in cooperation with Clarendon Hall School Land Trust, and with a loan secured from the John K. Crosswell Trust of Sumter, South Carolina, Clarendon Hall opened in a new, modern educational building in Summerton, S.C., situated on an eight-acre campus easily accessible because of its convenient location. During the school year 1975-76, the gymnasium, cafeteria, and current multi-purpose room were constructed. Calvary Baptist Church continued operation of the school until 2005 when a new non-profit corporation was formed known as Clarendon Hall School, Inc.
A major capital campaign project was begun in 2004 to raise funds to improve the facilities at Clarendon Hall. During phase one of the campaign, a new administration wing was added and gave the school a new entrance. Buildings one and two were connected with a new hall to include student lockers and new restrooms. Phase two of the project was completed in 2005 with new landscaping, paving and redesigning of the horseshoe driveway, and the addition of new fencing and arched gazebo. Phase three of the capital campaign project was begun in 2006 to include renovations to the gym and cafeteria, which included air conditioning in the gym. These projects are a direct result of the continued support Clarendon Hall receives from its patrons, alumni, and the community.
The Board, the student body, and the faculty have been drawn from all denominations. Clarendon Hall depends solely upon tuition and gifts received from individuals who are interested in the continuing growth of education through our state and nation.