Zachary Taylor, the 12th U.S. president (from 1849 to 1850), owned slaves throughout his life. As President, he generally resisted attempts to expand slavery in the territories and opposed the Compromise of 1850.

Taylor opposed the Compromise of 1850, which admitted California into the Union as a free state and banned the slave trade in Washington, D.C., in exchange for allowing most of the remaining territory captured from Mexico to decide the issue of slavery locally and passing a federal fugitive slave law requiring state authorities to assist federal marshals in capturing and detaining escaped slaves. However, Taylor died in office before he could veto the bill, leading to its successful passage under his successor Millard Fillmore. After his death, there were rumors that slavery advocates had poisoned him; tests of his body over 100 years later have been inconclusive. Taylor did not free any of his slaves in his will.

Taylor was a cotton planter who is believed to have owned, at minimum, 81 slaves when he became president.^[1] Taylor's slave ownership was a campaign issue in 1848, with opponents asserting that he would oppose the Wilmot Proviso and abolition because he owned 200-some slaves on two plantations in Mississippi and Louisiana and had recently invested heavily in "negroes" with purchases at the slave market in New Orleans.^[2] Taylor reportedly paid taxes on ownership of 114 slaves in Jefferson County, Mississippi in 1848.^[3] In 1848 slave trader Bernard M. Campbell sold two enslaved people to presidential candidate Zachary Taylor for $1500 (~$42,752 in 2023).^[4] Taylor both inherited slaves from his father and bequeathed slaves to his children upon his death.^[5]

Researchers believe that Charles Porter, Tom, Jane Webb, and William some of the enslaved people brought to the White House by Zachary Taylor. In 1861, Taylor's daughter submitted Jane Webb's name to the District of Columbia Compensated Emancipation program in which the government compensated slave owners for the value of their freed slaves.^[5]

Taylor's son Dick Taylor owned a sugar plantation, became an admired Confederate general, an opponent of Reconstruction, a Democratic Party (Third Party System) activist, and noted writer of history and memoir.^[6]

• Polk Taylor – Formerly enslaved Methodist minister (1833–1934)
• List of United States presidents who owned slaves