Moncton (/ˈmʌŋktən/; French pronunciation: [mɔŋktœn]) is the most populous city in the Canadian province of New Brunswick. Situated in the Petitcodiac River Valley, it lies at the geographic centre of the Maritime Provinces. The city has earned the nickname "Hub City" because of its central inland location in the region and its history as a railway and land transportation hub for the Maritimes. As of the 2024 Statistics Canada estimates, the city had a population of 97,523. The metropolitan population in 2024 was 188,036, making it the fastest growing census metropolitan area (CMA) in Canada for the year with a growth rate of 5.1%. Its land area is 140.67 km² (54.31 sq mi).

Although the Moncton area was first settled in 1733, Moncton was officially founded in 1766 with the arrival of Pennsylvania German immigrants from Philadelphia. Initially an agricultural settlement, Moncton was not incorporated until 1855. It was named for Lt. Col. Robert Monckton, the British officer who had captured nearby Fort Beauséjour a century earlier. A significant wooden shipbuilding industry had developed in the community by the mid-1840s, allowing for the civic incorporation of the town in 1855. The shipbuilding economy collapsed in the 1860s, causing the town to lose its civic charter in 1862. Moncton regained its charter in 1875 after the community's economy rebounded, mainly due to a growing railway industry. In 1871, the Intercolonial Railway of Canada chose Moncton as its headquarters, and Moncton remained a railway town for well over a century until the Canadian National Railway (CNR) locomotive shops closed in the late 1980s.

Although Moncton's economy was significantly impacted by the collapse of the shipbuilding industry in the 1860s and by the closure of the CNR locomotive shops in the 1980s, the city was able to rebound strongly on both occasions. It adopted the motto Resurgo (Latin: "I rise again") after its rebirth as a railway town. Its economy is stable and diversified, primarily based on its traditional transportation, distribution, retailing, and commercial heritage, and supplemented by strength in the educational, health care, financial, information technology, and insurance sectors. The strength of Moncton's economy has received national recognition in part due to a local unemployment rate that is consistently lower than the national average.

Acadians settled the head of the Bay of Fundy in the 1670s. The first reference to the "Petcoucoyer River" was on the De Meulles map of 1686. Settlement of the Petitcodiac and Memramcook river valleys began about 1700, gradually extending inland and reaching the site of present-day Moncton in 1733. The first Acadian settlers in the Moncton area established a marshland farming community and chose to name their settlement Le Coude ("The Elbow"), an allusion to the 90° bend in the river near the site of the settlement.

In 1755, nearby Fort Beauséjour was captured by British forces under the command of Lt. Col. Robert Monckton. The Beaubassin region including the Memramcook and Petitcodiac river valleys subsequently fell under English control. Later that year, Governor Charles Lawrence issued a decree ordering the expulsion of the Acadian population from Nova Scotia (including recently captured areas of Acadia such as Le Coude). This action came to be known as the "Great Upheaval".

The reaches of the upper Petitcodiac River valley then came under the control of the Philadelphia Land Company (one of the principals of which was Benjamin Franklin.) In 1766, Pennsylvania German settlers arrived to reestablish the preexisting farming community at Le Coude. The Settlers consisted of eight families: Heinrich Stief (Steeves), Jacob Treitz (Trites), Matthias Sommer (Somers), Jacob Reicker (Ricker), Charles Jones (Schantz), George Wortmann (Wortman), Michael Lutz (Lutes), and George Koppel (Copple). There is a plaque dedicated in their honour at the mouth of Hall's Creek. They renamed the settlement "The Bend". The Bend remained an agricultural settlement for nearly 80 more years. Even by 1836, there were only 20 households in the community. At that time, the Westmorland Road became open to year-round travel and a regular mail coach service was established between Saint John and Halifax. The Bend became an important transfer and rest station along the route. Over the next decade, lumbering and then shipbuilding became important industries in the area.

The community's turning point came when Joseph Salter took over (and expanded) a shipyard at the Bend in 1847. The shipyard grew to employ about 400 workers. The Bend subsequently developed a service-based economy to support the shipyard and gradually began to acquire all the amenities of a growing town. The prosperity engendered by the wooden shipbuilding industry allowed The Bend to incorporate as the town of Moncton in 1855. Although the town was named for Monckton, a clerical error at the time the town was incorporated resulted in the misspelling of its name, which has remained to the present day. Moncton's first mayor was the shipbuilder Joseph Salter.

In 1857, the European and North American Railway opened its line from Moncton to nearby Shediac. This was followed in 1859 by a line from Moncton to Saint John. At about the time of the railway's arrival, the popularity of steam-powered ships forced an end to the era of wooden shipbuilding. The Salter shipyard closed in 1858. The resulting industrial collapse caused Moncton to surrender its civic charter in 1862.