Northeast Region By dremlyugakl Dec 7, 1787 Deleware Dec 12, 1787 Pennsylvania Dec 18, 1787 New Jersey Jan 9, 1788 Connecticut Feb 6, 1788 Massachusetts Apr 28, 1788 Maryland Jun 21, 1788 New Hampshire Jul 26, 1788 New York May 29, 1790 Rhode Island Mar 4, 1791 Vermont Mar 15, 1820 Maine