Curriculum - American Civil War & Reconstruction Era (1856-1877)
- George Caleb Bingham
- George Catlin
- George Copway
- George Dewey
- George E. Pickett
- George G. Meade
- George H. Thomas
- George Sword
- George Washington Williams
- George Westinghouse
- Geronimo
- Great Sioux War
- Grover Cleveland
- Harriet Beecher Stowe
- Harriet Tubman
- Hayes Is Elected President
- Helen Hunt Jackson
- Henry Adams
- Henry Barnard
- Henry David Thoreau
- Henry George
- Henry Hobson Richardson
- Henry James
- Henry W. Halleck
- Henry Wadsworth Longfellow
- Henry Ward Beecher
- Herman Melville
- Hole-in-the-Day
- Hollow Horn Bear
- Homestead Act
- Hooker Jim
- Horace Greeley
- Horatio Alger
- Howling Wolf
- Hump
- Ida Tarbell
- Ignacio
- Impeachment of Andrew Johnson
- Indian Appropriation Act
- Indian Territory
- Indian-white relations: U.S., 1831-1870
- Indian-white relations: U.S., 1871-1933
- Inkpaduta
- Irateba
- Irvin McDowell
- Isaac Mayer Wise
- Isabella Stewart Gardner
- Isatai
- Isparhecher
- J. P. Morgan
