Rhode Island becomes the last of the original United States' colonies to ratify the Constitution and is admitted as the 13th U.S. state.

The Thirteen Colonies, also known as the Thirteen British Colonies, the Thirteen American Colonies, or later as the United Colonies, were a group of British colonies on the Atlantic coast of North America. Founded in the 17th and 18th centuries, they began fighting the American Revolutionary War in April 1775 and formed the United States of America by declaring full independence in July 1776. Just prior to declaring independence, the Thirteen Colonies in their traditional groupings were: New England (New Hampshire; Massachusetts; Rhode Island; Connecticut); Middle (New York; New Jersey; Pennsylvania; Delaware); Southern (Maryland; Virginia; North Carolina; South Carolina; and Georgia). The Thirteen Colonies came to have very similar political, constitutional, and legal systems, dominated by Protestant English-speakers. The first of these colonies was Virginia Colony in 1607, a Southern colony. While all these colonies needed to become economically viable, the founding of the New England colonies, as well as the colonies of Maryland and Pennsylvania, were substantially motivated by their founders' concerns related to the practice of religion. The other colonies were founded for business and economic expansion. The Middle Colonies were established on an earlier Dutch colony, New Netherland. All the Thirteen Colonies were part of Britain's possessions in the New World, which also included territory in Canada, Florida, and the Caribbean.The colonial population grew from about 2,000 to 2.4 million between 1625 and 1775, displacing Native Americans. This population included people subject to a system of slavery which was legal in all of the colonies prior to the American Revolutionary War. In the 18th century, the British government operated its colonies under a policy of mercantilism, in which the central government administered its possessions for the economic benefit of the mother country.

The Thirteen Colonies had a high degree of self-governance and active local elections, and they resisted London's demands for more control. The French and Indian War (17541763) against France and its Indian allies led to growing tensions between Britain and the Thirteen Colonies. During the 1750s, the colonies began collaborating with one another instead of dealing directly with Britain. With the help of colonial printers and newspapers these inter-colonial activities and concerns were shared and cultivated a sense a united American identity and led to calls for protection of the colonists' "Rights as Englishmen", especially the principle of "no taxation without representation". Conflicts with the British government over taxes and rights led to the American Revolution, in which the colonies worked together to form the Continental Congress. The colonists fought the American Revolutionary War (17751783) with the aid of the Kingdom of France and, to a much smaller degree, the Dutch Republic and the Kingdom of Spain.

Rhode Island ( (listen), like road), officially the State of Rhode Island, is a state in the New England region of the Northeastern United States. It is the smallest U.S. state by area and the seventh-least populous, with slightly fewer than 1.1 million residents as of 2020, but it is the second-most densely populated after New Jersey. It takes its name from the eponymous island, though most of its land area is on the mainland. Rhode Island borders 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; it also shares a small maritime border with New York. Providence is its capital and most populous city.

Native Americans lived around Narragansett Bay for thousands of years before English settlers began arriving in the early 17th century. Rhode Island was unique among the Thirteen British Colonies for being founded by a refugee, Roger Williams, who fled religious persecution from the Massachusetts Bay Colony to establish a haven for religious liberty. He founded Providence in 1636 on land purchased from local tribes, creating the first settlement in North America with an explicitly secular government. The Colony of Rhode Island and Providence Plantations subsequently became a destination for religious and political dissenters and social outcasts, earning it the moniker "Rogue's Island".Reflecting its status as a hub of relative tolerance and free thought, Rhode Island was the first colony to call for a Continental Congress in 1774 and the first to renounce its allegiance to the British Crown on May 4, 1776. After the American Revolution, during which it was heavily occupied and contested, Rhode Island became the fourth state to ratify the Articles of Confederation on February 9, 1778. Favoring a weaker central government, it boycotted the 1787 convention that drafted the United States Constitution, which it initially refused to ratify; it was the last of the original 13 states to do so, on May 29, 1790.Formerly named the State of Rhode Island and Providence Plantations since the colonial era, in November 2020 the state's voters approved an amendment to the state constitution formally dropping "and Providence Plantations" from its full name. Its official nickname is the "Ocean State", a reference to its 400 miles (640 km) of coastline and the large bays and inlets that comprise about 14% of its total area.