On December 7, 1787 Delaware became the first of the original thirteen colonies to ratify the Constitution and become a state. Three years later on May 29,1790 Rhode Island, was the last of the original 13 colonies to become a state.

Vermont was the first state added that was not an original colony and it became the 14th state in 1791. Hawaii is the last state to be added when it became the 50th state on Aug 21, 1959.

Hawaii gained statehood 172 years after Delaware became the first state.

More Info: en.wikipedia.org