The 19th century in the United States refers to the period in the United States from 1801 through 1900 in the Gregorian calendar. For information on this period, see: History of the United States series: History of the United States (1789–1849) History of the United States (1849–1865) History of the United States (1865–1918) Historical eras: Jeffersonian era Era of Good Feelings Jacksonian era American Civil War Reconstruction era Gilded Age Progressive Era