The District of Columbia Court of Appeals is the highest court of the District of Columbia, the capital city of the United States. The court was established in 1942 as the Municipal Court of Appeals, and it has been the court of last resort for matters of D.C. local law since 1970. The court is located in the former District of Columbia City Hall building at Judiciary Square. The D.C. Court of Appeals and the Superior Court of the District of Columbia comprise the District of Columbia's court system.

District of Columbia City Hall, also known as Old City Hall and the District of Columbia Courthouse, is a historic building at Judiciary Square in downtown Washington, D.C. facing Indiana Avenue. Originally built for the offices of the government of the District of Columbia, the District's courthouse was subsequently used as a Federal courthouse, and was the scene of several notable criminal trials including those of three accused presidential assassins. The building was declared a National Historic Landmark in 1960. It now houses the District of Columbia Court of Appeals.