The Old State House a/k/a the Old Provincial State House, is a historic building in Boston, Massachusetts, built in 1713. It was the seat of the Massachusetts General Court until 1798. It is located at the intersection of Washington and State Streets and is one of the oldest public buildings in the United States.

The Massachusetts General Court, formally the General Court of Massachusetts, is the state legislature of the Commonwealth of Massachusetts located in the state capital of Boston. The name "General Court" is a holdover from the earliest days of the Massachusetts Bay Colony, when the colonial assembly, in addition to making laws, sat as a judicial court of appeals. Before the adoption of the state constitution in 1780, it was called the Great and General Court, but the official title was shortened by John Adams, author of the state constitution. It is a bicameral body. The upper house is the Massachusetts Senate which is composed of 40 members. The lower body, the Massachusetts House of Representatives, has 160 members; until 1978, the state house had 240 members. It meets in the Massachusetts State House on Beacon Hill in Boston.