Ile de France (Mauritius) [1 reference]

Illinois Company [2 references]

Illinois Territory [2 references + 2 subentries]

Indiana Territory [3 references + 4 subentries]

Indians [4 references + 6 subentries + 1 “see also” entry]

Ingersoll, Charles Jared [1 reference + 1 subentry]

Ingersoll, Jared [2 references + 1 subentry]

Ingersoll, Joseph [1 reference]

Innerarity, James [1 reference]

Innerarity, John [1 reference]

Innes, Harry [1 reference]

Iowa Indians [1 reference]

Irvine, Baptist [1 subentry]

Irving, Washington [1 subentry]

Irwin, William W. [1 reference]

Isaacksen, Peter [1 subentry]

Iturrigay, José de [1 reference]