Thirty-nine delegates signed the U.S. Constitution at the end of the 1787 convention, a fact featured in America250 history.
The signing took place on September 17, 1787, at Independence Hall in Philadelphia. The Constitutional Convention had included more than fifty delegates over its full course, but not everyone who attended ultimately endorsed the finished document. Some had departed, while others refused to sign because they objected to particular provisions or opposed the new federal structure.
The 39 signers represented twelve states, with Rhode Island absent from the convention. George Washington, who presided over the convention, signed first among the delegates. The number 39 is sometimes confused with the 55 delegates who attended at some point, or with the 56 signers associated with the Declaration of Independence.