Thirty-nine delegates signed the United States Constitution, a foundational document associated with America250.
The signing took place at Independence Hall in Philadelphia on September 17, 1787, at the final session of the Constitutional Convention. Fifty-five delegates participated at some point, but only 39 endorsed the completed document. Three delegates present—Edmund Randolph, George Mason, and Elbridge Gerry—refused to sign.
The 39 signers represented 12 states because Rhode Island had declined to send delegates. George Washington, who presided over the convention, signed first. The number is often confused with the 55 delegates who attended or with the 56 people associated with signing the Declaration of Independence, which was a different document and event.