Claim: The fourth state to ratify the Articles of Confederation was Rhode Island.

Rhode Island -LRB- -LSB- roʊd_ˈaɪlənd -RSB- -RRB- , officially the State of Rhode Island and Providence Plantations , is a state in the New England region of the northeastern United States . Rhode Island is the smallest in area , the eighth least populous , and the second most densely populated of the 50 U.S. states , following New Jersey . Its official name is also the longest of any state in the Union . Rhode Island is bordered by Connecticut to the west , Massachusetts to the north and east , and the Atlantic Ocean to the south via Rhode Island Sound and Block Island Sound . The state also shares a short maritime border with New York .   On May 4 , 1776 , the Colony of Rhode Island became the first of the Thirteen Colonies to renounce its allegiance to the British Crown , and was the fourth among the newly sovereign states to ratify the Articles of Confederation on February 9 , 1778 . It boycotted the 1787 convention that drew up the United States Constitution and initially refused to ratify it . On May 29 , 1790 , Rhode Island became the 13th and last state to ratify the Constitution .   Rhode Island 's official nickname is `` The Ocean State '' , a reference to the fact that the state has several large bays and inlets that amount to about 14 % of its total area . Rhode Island covers 1214 sqmi , of which 1045 sqmi are land .