Peacefield, also called Old House, is a historic home formerly owned by second President of the United States, John Adams, and other members of the Adams family, located in Quincy, Massachusetts near Boston. It is now part of the Adams National Historical Park.

Peacefield was the home and farm of John Adams (1735–1826), author of the Constitution of the Commonwealth of Massachusetts, contributing author of the United States Constitution, first Vice President of the United States, and second President of the United States. Peacefield was also home to Adams' wife Abigail Smith Adams (November 11, 1744 – October 28, 1818) who is famous for her independence of thought and her correspondence with John Adams while he attended the Continental Congress in Philadelphia. Peacefield was also home to John Quincy Adams (July 11, 1767 – February 23, 1848) and his wife Louisa Catherine Adams, their son Charles Francis Adams (ambassador to the United Kingdom during the American Civil War), and historians Henry Adams and Brooks Adams.