The Norfolk County Courthouse, also known as the William D. Delahunt Courthouse, is a National Historic Landmark at 650 High Street in Dedham, Massachusetts. It currently houses the Norfolk County Superior Court. It is significant as a well-preserved Greek Revival courthouse of the 1820s, and as the site a century later of the famous Sacco-Vanzetti trial. The building was declared a National Historic Landmark in 1972, and is listed on the National Register of Historic Places. It replaced an earlier courthouse, built in 1795.

Dedham is a town in, and the county seat of, Norfolk County, Massachusetts, United States. Located on Boston's southwestern border, the population was 25,364 at the 2020 census.