New Jersey is a state located in both the Mid-Atlantic and Northeastern regions of the United States. Located at the geographic hub of the heavily urbanized Northeast megalopolis, it is bordered to the northwest, north, and northeast by New York State; on its east, southeast, and south by the Atlantic Ocean; on its west by the Delaware River and Pennsylvania; and on its southwest by Delaware Bay and Delaware. At 7,354 square miles (19,050 km2), New Jersey is the fifth-smallest U.S. state by land area. According to a 2025 U.S. Census Bureau estimate, it is the 11th-most populous state, with over 9.5 million residents, its highest estimated count ever. The state capital is Trenton, and the state's most populous city is Newark. New Jersey is the most densely populated U.S. state, and is the only U.S. state in which every county is deemed urban by the U.S. Census Bureau.
New Jersey was first inhabited by Paleo-Indians as early as 13,000 BC. The Lenape were the dominant Indigenous group when Europeans arrived in the early 17th century, and they were subdivided into dialectal groups such as the Munsee, in the north, and the Unami and the Unalachtigo, elsewhere. Dutch and Swedish colonists founded the first European settlements in the state, with the British later seizing control of the region and establishing the Province of New Jersey, named after the Channel Island of Jersey. The colony's fertile lands and relative religious tolerance drew a large and diverse population. New Jersey was among the Thirteen Colonies that supported the American Revolution, hosting several pivotal battles and military commands in the American Revolutionary War earning the title "Crossroads of the American Revolution". New Jersey remained in the Union during the American Civil War and provided troops, resources, and military leaders in support of the Union Army. After the war, the state emerged as a major manufacturing center and a leading destination for immigrants, helping drive the Industrial Revolution in the U.S. New Jersey was the site of many industrial, technological, and commercial innovations. Many prominent Americans associated with New Jersey have proven influential nationally and globally, including in academia, social advocacy, business, entertainment, government, military, non-profit leadership, and other fields.
New Jersey's central location in the Northeast megalopolis helped fuel its rapid growth and suburbanization in the second half of the 20th century. Since the beginning of the 21st century, the state's economy has become highly diversified, with major sectors including New Jersey's role as the world's largest biopharmaceutical industry hub; the state is widely known as the "Medicine Chest of the World". New Jersey excels in biotechnology, information technology, STEM education, finance, digital media, filmmaking, and tourism, and it has become an Atlantic seaboard epicenter for logistics and distribution. New Jersey is a major destination for immigrants and is home to one of the world's most multicultural populations. Since the onset of the 21st century, re-urbanization is taking place in New Jersey, particularly near New Jersey Transit rail hubs. New Jersey is the fastest-growing state in the U.S. Northeast and one of the fastest-growing in the United States overall, attributed to its resilient economy and aggressive homebuilding policies.
New Jersey is one of the most developed states in the U.S. New Jersey had a median household income of $99,781 as of 2023, the second-highest of any U.S. state behind Massachusetts. Almost one-tenth of all households in the state, or over 323,000, are millionaires, the highest representation of millionaires among all states and the highest density per square mile. Despite not being a U.S. border state, one-quarter of New Jersey's population is foreign born, the second-highest proportion after California. The state ranks near the top on both the American Human Development Index and the standard Human Development Index. New Jersey has been ranked the top U.S. state in physical and emotional wellness, despite being one of the most expensive states for residents to live in.
According to climatology research by the U.S. National Oceanic and Atmospheric Administration, New Jersey has been the fastest-warming state by average air temperature over a 100-year period beginning in the early 20th century, which has been attributed to significant warming of the North Atlantic Ocean, and the coastal waters of the Jersey Shore constitute one of the fastest-warming urban ocean shorelines in the world.
Since the 6th millennium BC, Native American people have inhabited New Jersey, beginning with the Lenape tribe. Scheyichbi is the Lenape name for the land that represents present-day New Jersey. The Lenape were several autonomous groups that practiced maize agriculture in order to supplement their hunting and gathering in the region surrounding the Delaware River, the lower Hudson River, and western Long Island Sound. The Lenape were divided into matrilineal clans that were based upon common female ancestors. Clans were organized into three distinct phratries identified by their animal sign: Turtle, Turkey, and Wolf. They first encountered the Dutch in the early 17th century, and their primary relationship with the Dutch and later European settlers was through fur trade.
Colonial era
The Dutch were the first Europeans to lay claim to geographic territory in present-day New Jersey. The Dutch colony of New Netherland consisted of parts of the modern Mid-Atlantic states. Although the European principle of land ownership was not recognized by the Lenape, Dutch West India Company policy required its colonists to purchase land that they settled. The first to do so was Michiel Pauw, who established a patroonship called Pavonia in 1630 along North River, that eventually became Bergen, the first permanent settlement, local civil government, and municipality in the state. Peter Minuit's purchase of lands along the Delaware River established the colony of New Sweden, that lasted until the Dutch conquered it in 1655. The entire region became a territory of England on June 24, 1664, after an English fleet under command of Colonel Richard Nicolls sailed into what is now New York Harbor and took control of Fort Amsterdam, annexing the entire province.
Since its inception, New Jersey has been characterized by ethnic and religious diversity. New England Congregationalists settled alongside Scots Presbyterians and Dutch Reformed migrants. While the majority of residents lived in towns with individual landholdings of 100 acres (40 ha), a few rich proprietors owned vast estates. English Quakers and Anglicans owned large landholdings. Unlike Plymouth Colony, Jamestown and other colonies, New Jersey was populated by a secondary wave of immigrants who came from other colonies instead of those who migrated directly from Europe. New Jersey remained agrarian and rural throughout the colonial era, and commercial farming developed sporadically. Some townships, such as Burlington on the Delaware River and Perth Amboy, emerged as important ports for shipping to New York City and Philadelphia. The colony's fertile lands and tolerant religious policy drew more settlers, and the New Jersey population had increased to 120,000 by 1775.
Settlement for the first ten years of English rule took place along the Hackensack River and Arthur Kill. Settlers came primarily from New York and New England. On March 18, 1673, Berkeley sold his half of the colony to Quakers in England, who settled the Delaware Valley region as a Quaker colony, with William Penn acting as trustee for the lands for a time. New Jersey was governed as two distinct provinces, East and West Jersey, for 28 years between 1674 and 1702, which were part of the Dominion of New England from 1686 to 1689.
In 1702, the two provinces were reunited under a royal governor rather than a proprietary one. Edward Hyde, titled Lord Cornbury, became the first governor of the royal colony. Britain believed that he was an ineffective and corrupt ruler, taking bribes and speculating on land. In 1708, he was recalled to England. New Jersey was then ruled by the governors of New York, but this infuriated the settlers of New Jersey, who accused these governors of favoritism to New York. Judge Lewis Morris led the case for a separate governor, and was appointed governor by King George II in 1738.
During the American Revolutionary War, British and American armies crossed New Jersey numerous times with several pivotal battles taking place in the state. In total, there were 296 engagements that occurred within New Jersey, more clashes than occurred in any other of the 13 colonies during the war. Because of this, New Jersey today is sometimes referred to as "The Crossroads of the American Revolution". The winter quarters of the Continental Army were established in New Jersey twice by General George Washington in Morristown, which has been called "The Military Capital of the American Revolution".
Continental Army forces under Washington's command met British forces under General Henry Clinton at the Battle of Monmouth in an indecisive engagement in June 1778. Washington's forces attempted to take the British column by surprise. When the British army attempted to flank the Americans, the Continental Army retreated in disorder. Their ranks were later reorganized and withstood British charges.
On December 18, 1787, New Jersey became the third state to ratify the United States Constitution, which was overwhelmingly popular in New Jersey since it prevented New York and Pennsylvania from charging tariffs on goods imported from Europe. On November 20, 1789, New Jersey became the first in the newly formed Union to ratify the Bill of Rights.
The New Jersey 1776 State Constitution gave the vote to all inhabitants who had a certain level of wealth or owned property. Both parties passed the Voting Rights Acts. This included women and Black people, excluding married women who were not legally permitted to own property separately from their husbands. Unmarried women retained their suffrage in the new state of New Jersey from 1776 to 1807. Nonetheless, in several elections both sides claimed that their opposing candidates were without merit and were trying to win just by influencing women voters and they accused their opponents of seeking "petticoat electors". In 1807, the state legislature passed a bill interpreting the constitution to mean universal white male suffrage, excluding paupers; the constitution was itself an act of the legislature and not enshrined as the modern constitution.
19th century
On February 15, 1804, New Jersey became the last northern state to abolish new slavery and enacted legislation that slowly phased out existing slavery. This led to a gradual decrease of the slave population. By the American Civil War's end, about a dozen African Americans in New Jersey were still held in bondage. New Jersey voters eventually ratified the constitutional amendments banning slavery and granting rights to the United States' black population.
In 1844, the second state constitution was ratified and brought into effect. Counties thereby became districts for the state senate, and some realignment of boundaries (including the creation of Mercer County) immediately followed. This provision was retained in the 1947 Constitution, but was overturned by the Supreme Court of the United States in 1962, by the decision Baker v. Carr. While the Governorship was stronger than under the 1776 constitution, the 1844 constitution created many offices that were not responsible to the governor or the people. Furthermore, it limited him to a single three-year term.
New Jersey was one of the few Union states (the others being Delaware and Kentucky) to select a candidate other than Abraham Lincoln twice in national elections, and sided with Stephen A. Douglas (1860) and George B. McClellan (1864) during their campaigns. McClellan, a native Philadelphian, had New Jersey ties and formally resided in New Jersey at the time; he later became Governor of New Jersey (1878–81). During the American Civil War, the state was led by Republican governor Charles Smith Olden and later by Democrat Joel Parker. Between 65,000 and 80,000 state soldiers enlisted in the Union army; unlike many other states, it saw no battles.
In the Industrial Revolution, cities like Paterson grew and prospered. Previously, the economy had been largely agrarian, which was problematically subject to crop failures and poor soil. This caused a shift to a more industrialized economy, one based on manufactured commodities such as textiles and silk. InventorThomas Edison also became an important figure of the Industrial Revolution, having been granted 1,093 patents, many of which for inventions he developed while working in New Jersey. Edison's facilities, first at Menlo Park and then in West Orange, are considered perhaps the first research centers in the United States. Christie Street in Menlo Park was the first thoroughfare in the world to have electric lighting. Transportation was greatly improved as locomotion and steamboats were introduced to New Jersey.