The 1868 Democratic National Convention was held at the Tammany Hall headquarters building in New York City between July 4, and July 9, 1868. The first Democratic convention after the conclusion of the American Civil War, the convention was notable for the return of Democratic Party politicians from the Southern United States.

Horatio Seymour was an American politician. He served as Governor of New York from 1853 to 1854 and from 1863 to 1864. He was the Democratic Party nominee for president in the 1868 United States presidential election, losing to Republican Ulysses S. Grant.