The history of New Orleans, Louisiana traces the city's development from its founding by the French in 1718 through its period of Spanish control, then briefly back to French rule before being acquired by the United States in the Louisiana Purchase in 1803. During the War of 1812, the last major battle was the Battle of New Orleans in 1815. Throughout the 19th century, New Orleans was the largest port in the Southern United States, exporting most of the nation's cotton output and other farm products to Western Europe and New England. As the largest city in the South at the start of the Civil War (1861–1865), it was an early target for capture by Union forces. With its rich and unique cultural and architectural heritage, New Orleans remains a major destination for live music, tourism, conventions, and sporting events and annual Mardi Gras celebrations. After the significant destruction and loss of life resulting from Hurricane Katrina in 2005, the city would bounce back and rebuild in the ensuing years, though it still has not recovered from the loss of much of its original population and the loss of much of the Black population has affected the city's culture that cannot be replicated by the influx of new ethnic and cultural groups post-Katrina.
Pre-history through Native American era
The land mass that was to become the city of New Orleans was formed around 2200 BCE when the Mississippi River deposited silt creating the delta region. Before Europeans colonized the area, it was inhabited by Native Americans for about 1300 years. The Mississippian culture peoples built mounds and earthworks in the area. Later Native Americans created a portage between the headwaters of Bayou St. John (known to the natives as Bayouk Choupique) and the Mississippi River. The bayou flowed into Lake Pontchartrain. This became an important trade route. Archaeological evidence has shown settlement in New Orleans dating back to at least 400 C.E. Bulbancha was one of the original names of New Orleans and means "place of many tongues" in Choctaw. Bulbancha was an important trading hub for thousands of years.
Colonial era First French colonial period
French explorers, fur trappers and traders arrived in the area by the 1690s, some making settlements amid the Native American village of thatched huts along the Bayou. By the end of the decade, the French made an encampment called "Port Bayou St. Jean" near the head of the bayou; this would later be known as the Faubourg St. John neighborhood. The French also built a small fort, "St. Jean" (known to later generations of New Orleanians as "Old Spanish Fort") at the mouth of the bayou in 1701, using as a base a large Native American shell midden dating back to the Marksville culture. In 1708, land grants along the Bayou were given to French settlers from Mobile, but the majority left within the next two years due to the failure of attempts to grow wheat there. These early European settlements are now within the limits of the city of New Orleans, though they predate the city's official founding.
New Orleans was founded in early 1718 by the French as La Nouvelle-Orléans, under the direction of Louisiana governor Jean-Baptiste Le Moyne de Bienville. After considering several alternatives, Bienville selected the site for several strategic reasons and practical considerations, including: it was relatively high ground, along a sharp bend of the flood-prone Mississippi River, which thus created a natural levee (previously chosen as the site of an abandoned Quinipissa village); it was adjacent to the trading route and portage between the Mississippi and Lake Pontchartrain via Bayou St. John, offering access to the Gulf of Mexico port of Biloxi without going downriver 100 miles; and it offered control of the entire Mississippi River Valley, at a safe distance from Spanish and English colonial settlements.
From its founding, the French intended New Orleans to be an important colonial city. The city was named in honor of the then Regent of France, Philip II, Duke of Orléans. The regent allowed Scottish economist John Law to create a private bank and a financing scheme that succeeded in increasing the colonial population of New Orleans and other areas of Louisiana. The scheme, however, created an investment bubble that burst at the end of 1720. Law's Mississippi Company collapsed, stopping the flow of investment money to New Orleans. Nonetheless, in 1722, New Orleans was made the capital of French Louisiana, replacing Biloxi in that role.
The priest-chronicler Pierre François Xavier de Charlevoix described New Orleans in 1721 as a place of a hundred wretched hovels in a malarious wet thicket of willows and dwarf palmettos, infested by serpents and alligators; he seems to have been the first, however, to predict for it an imperial future. Pierre Le Blond de La Tour, the city engineer, in 1717 commenced the public works at the river front to protect the new city from overflows, but it was ten years later that the levee was completed.Faris, R. L. “The Mississippi River Problem.” The Military Engineer, vol. 19, no. 104, 1927, pp. 110–17. JSTOR, http://www.jstor.org/stable/44572735. Accessed 1 May 2026.
In September 1722, a hurricane struck the city, blowing most of the structures down. After this, the administrators enforced the grid pattern dictated by Bienville but hitherto previously mostly ignored by the colonists. This grid plan is still seen today in the streets of the city's "French Quarter" (see map).
Much of the colonial population in early days was of the wildest character: deported galley slaves, trappers, gold-hunters; the colonial governors' letters were full of complaints regarding the riffraff sent as soldiers as late as Kerlerec's administration (1753–1763). Shortly after the founding, slaves were required to build the public works of the nascent city for thirty days when the crops had been harvested.Rowland, Dunbar and Sanders, Albert G. Mississippi Provincial Archives : French Dominion 1701-1729/ collected, edited, and translated by Dunbar Rowland and A.G. Sanders. Jackson, Miss.: Baton Rouge : Press of the Mississippi Department of Archives and History : Louisiana State University Press, 1927-32. Volume 2., pp. 589-590.
Two large lakes (in reality estuaries) in the vicinity, Lake Pontchartrain and Lake Maurepas, commemorate respectively Louis Phelypeaux, Count Pontchartrain, minister and chancellor of France, and Jean Frederic Phelypeaux, Count Maurepas, minister and secretary of state. A third body of water, Lake Borgne, was originally a land-locked inlet of the sea; its name has reference to its incomplete or defective character.
Spanish interregnum
In 1763 following Britain's victory in the Seven Years' War, the French colony west of the Mississippi River—plus New Orleans—was ceded to the Spanish Empire as a secret provision of the 1762 Treaty of Fontainebleau, confirmed the following year in the Treaty of Paris. This was to compensate Spain for the loss of Florida to the British, who also took the remainder of the formerly French territory east of the River.
No Spanish governor came to take control until 1766. French and German settlers, hoping to restore New Orleans to French control, forced the Spanish governor to flee to Spain in the bloodless Rebellion of 1768. A year later, the Spanish reasserted control, executing five ringleaders and sending five plotters to a prison in Cuba, and formally instituting Spanish law. Other members of the rebellion were forgiven as long as they pledged loyalty to Spain. Although a Spanish governor was in New Orleans, it was under the jurisdiction of the Spanish garrison in Cuba.
In the final third of the Spanish period, two massive fires burned the great majority of the city's buildings. The Great New Orleans Fire of 1788 destroyed 856 buildings in the city on Good Friday, March 21 of that year. In December 1794 another fire destroyed 212 buildings. After the fires, the city was rebuilt with bricks, replacing the simpler wooden buildings constructed in the early colonial period. Much of the 18th-century architecture still present in the French Quarter was built during this time, including three of the most impressive structures in New Orleans—St. Louis Cathedral, the Cabildo and the Presbytere. The architectural character of the French Quarter, including multi-storied buildings centered around inner courtyards, large arched doorways, and the use of decorative wrought iron, were ubiquitous in parts of Spain and the Spanish colonies, although precedents in French colonial and even Anglo-colonial America exist. Spanish influence on the urban landscape in New Orleans may be attributed to the fact that the period of Spanish rule saw a great deal of immigration from all over the Atlantic, including Spain and the Canary Islands, and the Spanish colonies.Ermus (2013), pp. 324327.
In 1795 and 1796, the sugar processing industry was first put upon a firm basis. The last twenty years of the 18th century were especially characterized by the growth of commerce on the Mississippi, and the development of those international interests, commercial and political, of which New Orleans was the center. Within the city, the Carondelet Canal, connecting the back of the city along the river levee with Lake Pontchartrain via Bayou St. John, opened in 1794, which was a boost to commerce.
Through Pinckney's Treaty signed on October 27, 1795, Spain granted the United States "Right of Deposit" in New Orleans, allowing Americans to use the city's port facilities.
Retrocession to France and Louisiana Purchase
In 1800, Spain and France signed the secret Treaty of San Ildefonso stipulating that Spain give Louisiana back to France, although it had to remain under Spanish control as long as France wished to postpone the transfer of power. There was another relevant treaty in 1801, the Treaty of Aranjuez, and later a royal bill issued by King Charles IV of Spain in 1802; these confirmed and finalized the retrocession of Spanish Louisiana to France.
In April 1803, Napoleon sold Louisiana (New France), which then included portions of more than a dozen present-day states) to the U.S. in the Louisiana Purchase. A French prefect, Pierre Clément de Laussat, who had only arrived in New Orleans on March 23, 1803, formally took control of Louisiana for France on November 30, only to hand it over to the U.S. on December 20, 1803. In the meantime he created New Orleans' first city council, abolishing the Spanish cabildo.
19th century
In 1805, a census showed a heterogeneous population of 8,500, comprising 3,551 whites, 1,556 free blacks, and 3,105 slaves. Observers at the time and historians since believe there was an undercount and the true population was about 10,000.
Early 19th century: a rapidly growing commercial center
The next dozen years were marked by the beginnings of self-government in city and state; by the excitement attending the Aaron Burr conspiracy (in the course of which, in 1806–1807, General James Wilkinson practically put New Orleans under martial law); and by the War of 1812. From early days the city was noted for its cosmopolitan polyglot population and mixture of cultures. It grew rapidly, with influxes of Americans, African, French and Creole French (people of French descent born in the Americas) and Creoles of color (people of mixed European and African ancestry), many of the latter two groups fleeing from the violent revolution in Haiti.