- Jacksonville, Ill., 103
- Janesville, Wis., 108
- Jayne, Gershom, 14, 59
- Johnson, Joel, 28
- Johnson, Willis H., 46
- Johnston, Andrew, 45
- Johnston, John D., in Coles County, 60; flat|boat trip, 7; Lincoln's letters to, 61-63
- Jonas, Abraham, 44
- Joy, James F., atty. for Ill. Central R.R., 36, 48, 49, 51
- Judd, Norman B., chairman, Rep. party, 105; Effie Afton case, 56; Lincoln's loan to, 54, 78, 79, 81, 137
- "Junto" (Springfield, Ill.), 100
