- Holcombe, William H. (William Henry), 1825-18932
- Hollingworth, Harry L. (Harry Levi), 1880-1956, author2
- Horsell, William, 1808-18632
- Horsford, Eben Norton, 1818-18932
- Hosack, David, 1769-18352
- Hotze, Conrad L., 1839-1913, author2
- Howard, Henry, 1792-18742
- Howe, A. Jackson (Andrew Jackson), 1825-18922
- Howe, John Moffat, 1805-18852
- Howe, Lucien, 1848-1928, author2
- Howitt, William, 1792-18792
- Hudson, E. Darwin (Erasmus Darwin), 1843-18872
- Hume, David, 1711-17762
- Hunt, Ezra Mundy, 1830-18942
- Hunt, Mary H. (Mary Hannah), 1830-1906, author2
- Hutchison, Joseph C. (Joseph Chrisman), 1822-1887, author2
- Illinois, enacting jurisdiction.2
- James W. Queen & Company, author.2
- Jeffcott, George F., author2
- Jefferis, B. G. (Benjamin Grant), 1851-2