Connecticut ( ) is a state in the New England region of the Northeastern United States. It borders Rhode Island to the east, Massachusetts to the north, New York to the west, and Long Island Sound to the south. Its capital is Hartford, and its most populous city is Bridgeport. Connecticut lies between the major hubs of New York City and Boston along the Northeast Corridor, where the New York metropolitan area, which includes four of Connecticut's seven largest cities, extends into the southwestern part of the state. Connecticut is the third-smallest state by area after Rhode Island and Delaware, and the 29th-most populous with more than 3.6 million residents as of 2024, ranking it fourth among the most densely populated U.S. states.
The state is named after the Connecticut River, the longest in New England, which roughly bisects the state and drains into the Long Island Sound between the towns of Old Saybrook and Old Lyme. The name of the river is in turn derived from anglicized spellings of , a Mohegan-Pequot word for "long tidal river". Before the arrival of the first European settlers, the region was inhabited by various Algonquian tribes. In 1633, the Dutch West India Company established a small, short-lived settlement called House of Hope in Hartford. Half of Connecticut was initially claimed by the Dutch colony New Netherland, which included much of the land between the Connecticut and Delaware Rivers, although the first major settlements were established by the English around the same time. Thomas Hooker led a band of followers from the Massachusetts Bay Colony to form the Connecticut Colony, while other settlers from Massachusetts founded the Saybrook Colony and the New Haven Colony; both had merged into the first by 1664.
Connecticut's environmental history is shaped by Indigenous land stewardship, colonial displacement, industrial development, and modern environmental regulation. The Pequot and Mohegan peoples maintained sustainable relationships with the land prior to colonization, which were later disrupted by forced removal and legal restrictions on land and sovereignty. Industrial growth in the 19th and 20th centuries concentrated manufacturing along river systems, contributing to pollution and environmental inequality. In response, modern state and federal environmental policies have been developed to regulate pollution and protect natural resources.
Connecticut's official nickname, the "Constitution State", refers to the Fundamental Orders adopted by the Connecticut Colony in 1639, which is considered by some to be the first written constitution in Western history. As one of the Thirteen Colonies that rejected British rule during the American Revolution, Connecticut was influential in the development of the federal government of the United States. In 1787, Roger Sherman and Oliver Ellsworth, state delegates to the Constitutional Convention, proposed a compromise between the Virginia and New Jersey Plans; its bicameral structure for Congress, with a respectively proportional and equal representation of the states in the House of Representatives and Senate, was adopted and remains to this day. In January 1788, Connecticut became the fifth state to ratify the Constitution.
Connecticut is a developed and affluent state, performing well on the Human Development Index and on different metrics of income except for equality. It is home to a number of prestigious educational institutions, including Yale University in New Haven, as well as other liberal arts colleges and private boarding schools in and around the "Knowledge Corridor". Due to its geography, Connecticut has maintained a strong maritime tradition; the United States Coast Guard Academy is located in New London by the Thames River. The state is also associated with the aerospace industry through major companies Pratt & Whitney and Sikorsky Aircraft headquartered in East Hartford and Stratford, respectively. Historically a manufacturing center for arms, hardware, and timepieces, Connecticut transitioned into an economy based on the financial, insurance, and real estate sectors; many multinational firms providing such services can be found concentrated in the state capital of Hartford and along the Gold Coast in Fairfield County.
History
First people The name Connecticut is derived from the Mohegan-Pequot word that has been translated as "long tidal river" and "upon the long river", both referring to the Connecticut River. Evidence of human presence in the Connecticut region dates to as far back as 10,000 years ago. Stone tools were used for hunting, fishing, and woodworking. Semi-nomadic in lifestyle, these peoples moved seasonally to take advantage of various resources in the area. They shared languages based on Algonquian. The Connecticut region was inhabited by many Native American tribes that can be grouped into the Nipmuc, the Sequin or "River Indians" (which included the Tunxis, Schaghticoke, Podunk, Wangunk, Hammonasset, and Quinnipiac), the Mattabesec or "Wappinger Confederacy" and the Pequot-Mohegan. Some of these groups still reside in Connecticut, including the Mohegans, the Pequots, and the Paugusetts.Connecticut Native American Tribes , Connecticut State Library. Retrieved May 16, 2014.
In the early 17th century, about 8,000 Pequots lived in southeastern Connecticut between the Thames and Pawcatuck rivers, a number roughly halved by the smallpox epidemic of 1633–34, and 1,500 to 2,500 Mohegans lived west of the Thames. The Mohegan and Pequot economies combined hunting, shellfishing, gathering, and maize agriculture in which corn, beans, and squash were interplanted. Controlled burns and seasonal movement were used to manage resources. Wampum made from quahog and whelk shells served as currency and as a record of agreements.
Colonial period
Dutchman Adriaen Block was the first European explorer in Connecticut. He explored the region in 1614. Dutch fur traders then sailed up the Connecticut River, calling it Versche Rivier ("Fresh River") and building a fort at Dutch Point in Hartford, which they named "House of Hope" ().
The Connecticut Colony originally consisted of several smaller settlements in Windsor, Wethersfield, Saybrook, Hartford, and New Haven. The first English settlers came in 1633 and settled at Windsor, then at Wethersfield the following year. John Winthrop the Younger of Massachusetts received a commission to create Saybrook Colony at the mouth of the Connecticut River in 1635.
A large group of Puritans arrived in 1636 from Massachusetts Bay Colony, led by Thomas Hooker, who established the Connecticut Colony at Hartford. The Fundamental Orders of Connecticut were adopted in January 1639, and have been described as the first constitutional document in America.
The Quinnipiack Colony was established by John Davenport, Theophilus Eaton, and others at New Haven in March 1638. The New Haven Colony had its own constitution called "The Fundamental Agreement of the New Haven Colony", signed on June 4, 1639.
Each settlement was an independent political entity, established without official sanction of the English Crown. In 1662, Winthrop traveled to England and obtained a charter from CharlesII which united the settlements of Connecticut. Historically significant colonial settlements included Windsor (1633), Wethersfield (1634), Saybrook (1635), Hartford (1636), New Haven (1638), Fairfield (1639), Guilford (1639), Milford (1639), Stratford (1639), Farmington (1640), Stamford (1641), and New London (1646).
The Pequot War marked the first significant clash between colonists and Native Americans in New England. The Pequot had been aggressively extending their area of control at the expense of the Wampanoag to the north, Narragansett (east), Connecticut River Valley Algonquian tribes and the Mohegan (west), and Lenape Algonquian people (south). Meanwhile, the Pequot had been reacting with increasing aggression to colonial territorial expansion. In response to the 1636 murder of an English privateer and his crew, followed by the murder of a trader, colonists raided a Pequot village on Block Island. The Pequots laid siege to Saybrook Colony's garrison that autumn, then raided Wethersfield in the spring of 1637. Organizing a band of militia and allies from the Mohegan and Narragansett tribes, colonists declared war and attacked a Pequot village on the Mystic River. Death toll estimates range between 300 and 700 Pequots. After suffering another major loss at a battle in Fairfield, the Pequots sued for peace.
The Mashantucket Pequot Nation, descendants of the Pequot people of southern New England, experienced significant population loss due to violence and disease in the early seventeenth century. In the aftermath, Pequot leaders sued for peace, resulting in the Treaty of Hartford, which divided the surviving Pequots among the Narragansett and Mohegan tribes and forbade them from being called "Pequot" or returning to their homeland. Not until 1651 were surviving Pequots permitted to resettle on 500 acres of their former land.
A dispute over roughly 20,000 acres that the Mohegans said the colony had reserved for them became Mohegan Indians v. Connecticut, the first Indigenous land claim litigated before an English court. A royal commission ruled for the Mohegans in 1705; Connecticut appealed, and after further commissions in 1738 and 1743 the Privy Council dismissed the case in 1773.
Connecticut's original Charter in 1662 granted it all the land to the "South Sea"—that is, to the Pacific Ocean. The Hartford Treaty with the Dutch was signed on September 19, 1650, but never ratified by the British, stated the western boundary of Connecticut ran north from Greenwich Bay for a distance of , "provided the said line come not within of Hudson River". This agreement was observed by both sides until war erupted between England and The Netherlands in 1652. Conflict continued concerning colonial limits until the Duke of York captured New Netherland in 1664.
Most Colonial royal grants were for long east–west strips. Connecticut took its grant seriously and established a ninth county between the Susquehanna River and Delaware River named Westmoreland County. This resulted in the brief Pennamite-Yankee Wars with Pennsylvania.
Yale College was established in 1701, providing Connecticut with an important institution to educate clergy and civil leaders. The Congregational church dominated religious life in the colony and, by extension, town affairs in many parts.
With more than of coastline including along its navigable rivers, Connecticut developed the antecedents of a maritime tradition during its colonial years that would later produce booms in shipbuilding, marine transport, naval support, seafood production, and leisure boating.
Historical records list the Tryall as the first vessel built in Connecticut Colony, in 1649 at a site on the Connecticut River in modern Wethersfield. In the two decades leading up to 1776 and the American Revolution, Connecticut boatyards launched about 100 sloops, schooners and brigs according to a database of U.S. customs records maintained online by the Mystic Seaport Museum, the largest being the 180-ton Patient Mary launched in New Haven in 1763. The New London Harbor Lighthouse was constructed in 1760 at the mouth of the Thames River as Connecticut's first lighthouse.
American Revolution