The Walpole Academy is a historic former school building on Main Street in Walpole, New Hampshire. It is now owned by the Walpole Historical Society and operated as a local history museum. The wood frame building was built in 1831, and is a fine rural example of a 19th-century Greek Revival academy building. The building has a classic Greek temple appearance, with Doric columns supporting an entablature and a triangular pediment with a fanlight detail. The building is topped by an octagonal, arcaded cupola. The academy building was used as a private school until 1853, when the town acquired for use as its high school. It was purchased from the town by the historical society in 1950.