Martin Van Buren (/væn ˈbjʊərən/ van BYOO-rən; Dutch: Maarten van Buren [ˈmaːrtə(ɱ) vɑm ˈbyːrə(n)] ^ⓘ; December 5, 1782 – July 24, 1862) was the eighth president of the United States, serving from 1837 to 1841. A primary founder of the Democratic Party, Van Buren held a number of prominent offices. He served as New York's attorney general and U.S. senator, then briefly as the ninth governor of New York. After joining Andrew Jackson's administration, he served as the tenth United States secretary of state, minister to the United Kingdom, and ultimately, as the eighth vice president from 1833 to 1837, after being elected on Jackson's ticket in 1832. Van Buren won the presidency in 1836 against divided Whig opponents. He lost re-election in 1840, and failed to win the Democratic nomination in 1844. Later in his life, Van Buren re-emerged as an elder statesman and an anti-slavery leader who led the Free Soil Party ticket in the 1848 presidential election.

He was born in Kinderhook, New York, where most residents were of Dutch descent and spoke Dutch as their primary language. Van Buren is the only president to have spoken English as a second language. He entered politics as a member of the Democratic-Republican Party, won a seat in the New York State Senate, and was elected to the United States Senate in 1821. As the leader of the Bucktails faction of the party, Van Buren established the political machine known as the Albany Regency. He ran successfully for governor of New York to support Andrew Jackson's candidacy in the 1828 presidential election but resigned shortly after Jackson was inaugurated so he could accept appointment as Jackson's secretary of state. In the cabinet, Van Buren was a key Jackson advisor and built the organizational structure for the coalescing Democratic Party. He ultimately resigned to help resolve the Petticoat affair and briefly served as ambassador to the United Kingdom. At Jackson's behest, the 1832 Democratic National Convention nominated Van Buren for vice president, and he took office after the Democratic ticket won the 1832 presidential election.

With Jackson's strong support and the organizational strength of the Democratic Party, Van Buren successfully ran for president in the 1836 presidential election. However, his popularity soon eroded because of his response to the Panic of 1837, which centered on his Independent Treasury system, a plan under which the federal government of the United States would store its funds in vaults rather than in banks. More conservative Democrats and Whigs in Congress ultimately delayed Van Buren's plan from being implemented until 1840. His presidency was further marred by the costly Second Seminole War and his refusal to admit Texas to the Union as a slave state. In 1840, he lost his re-election bid to William Henry Harrison. While Van Buren is praised for anti-slavery stances, in historical rankings, historians and political scientists often rank him as an average or below-average U.S. president, due to his handling of the Panic of 1837.

He was initially the leading candidate for the Democratic Party's nomination again in 1844, but his continued opposition to the annexation of Texas angered Southern Democrats, leading to the nomination of James K. Polk. Growing opposed to slavery, Van Buren was the newly formed Free Soil Party's presidential nominee in 1848, and his candidacy helped Whig nominee Zachary Taylor defeat Democrat Lewis Cass. Worried about sectional tensions, Van Buren returned to the Democratic Party after 1848 but was disappointed with the pro-southern presidencies of Franklin Pierce and James Buchanan. During the American Civil War, Van Buren was a War Democrat who supported the policies of President Abraham Lincoln, a Republican. He died of asthma at his home in Kinderhook in 1862, aged 79.

Martin Van Buren was born on December 5, 1782, in Kinderhook, New York, His father, Abraham Van Buren, was a descendant of Cornelis Maessen, a native of Buurmalsen, Netherlands, who had emigrated to New Netherland in 1631 and purchased a plot of land on Manhattan Island. He was the first President born after the Declaration of Independence and the last born prior to British ratification of the terms of the 1783 Treaty of Paris that ended the American Revolutionary War; as a result, Van Buren was the last President to be born, (but not last to serve) a 'jus soli' British Subject by birth in one of the Thirteen Colonies. Abraham Van Buren had been a Patriot during the American Revolution, and he later joined the Democratic-Republican Party. He owned an inn and tavern in Kinderhook and served as Kinderhook's town clerk for several years. In 1776, he married Maria Hoes (or Goes) Van Alen (1746–1818) in the town of Kinderhook, also of Dutch extraction and the widow of Johannes Van Alen (1744-c. 1773). She had three children from her first marriage, including future U.S. Representative James I. Van Alen. Her second marriage produced five children, of which Martin was the third.

Van Buren received a basic education at the village schoolhouse, and briefly studied Latin at the Kinderhook Academy and at Washington Seminary in Claverack. Van Buren had entirely Dutch ancestry and was raised speaking primarily Dutch; he learned English while attending school and is the only president of the United States whose first language was not English. Also during his childhood, Van Buren learned at his father's inn how to interact with people from varied ethnic, income, and societal groups, which he used to his advantage as a political organizer. His formal education ended in 1796, when he began reading law at the office of Peter Silvester and his son Francis.

Van Buren, at 5 feet 6 inches (1.68 m) tall, was small in stature, and affectionately nicknamed "Little Van". He was also called the "Red Fox" due to his "bushy reddish sideburns, striking forehead and prominent nose". When he began his legal studies he wore rough, homespun clothing, causing the Silvesters to admonish him to pay greater heed to his clothing and personal appearance as an aspiring lawyer. He accepted their advice, and subsequently emulated the Silvesters' clothing, appearance, bearing, and conduct. The lessons he learned from the Silvesters were reflected in his career as a lawyer and politician, in which Van Buren was known for his amiability and fastidious appearance. Despite Kinderhook's strong affiliation with the Federalist Party, of which the Silvesters were also strong supporters, Van Buren adopted his father's Democratic-Republican leanings. The Silvesters and Democratic-Republican political figure John Peter Van Ness suggested that Van Buren's political leanings constrained him to complete his education with a Democratic-Republican attorney, so he spent a final year of apprenticeship in the New York City office of John Van Ness's brother William P. Van Ness, a political lieutenant of Aaron Burr. Van Ness introduced Van Buren to the intricacies of New York state politics, and Van Buren observed Burr's battles for control of the state Democratic-Republican party against George Clinton and Robert R. Livingston. He returned to Kinderhook in 1803, after his admission to the New York bar.

Van Buren married Hannah Hoes in Catskill, New York, on February 21, 1807, when he was 24 years old and she was 23. She was his childhood sweetheart and a daughter of his maternal first cousin, Johannes Dircksen Hoes. She grew up in Valatie, and like Van Buren her home life was primarily Dutch; she spoke Dutch as her first language, and spoke English with a marked accent. The couple had six children, four of whom lived to adulthood: Abraham (1807–1873), unnamed daughter (stillborn around 1809), John (1810–1866), Martin Jr. (1812–1855), Winfield Scott (born and died in 1814), and Smith Thompson (1817–1876). Hannah contracted tuberculosis, and died in Kinderhook on February 5, 1819. Martin Van Buren never remarried.