| Title | Author |
|---|---|
| Ice Slough | |
| Ice Slough, Oregon Trail landmark | WyoHistory.org |
| Independence Rock | Will Bagley |
| Independence Rock State Historic Site | |
| Indian Boarding Schools, Wyoming and nationwide | Geoffrey O’Gara |
| Indian Citizenship Expedition, 1913 | Johanna Wickman |
| Indian geography in Wyoming | Gregory Nickerson |
| Indian Reorganization Act | WyoHistory.org |
| Indian tribes, trade among | Samuel Western |
| Influenza epidemic, 1918, Wyoming | Phil Roberts |