First 9 states to ratified the constitution By brooke24 Dec 7, 1787 Delaware Dec 12, 1787 Pennsylvania Dec 18, 1787 New Jersey Jan 2, 1788 Georgia Jan 9, 1788 Connecticut Feb 6, 1788 Massachusetts Apr 28, 1788 Maryland May 23, 1788 South Carolina Jun 21, 1788 New Hampshire