| Huxtable Ranch | Encyclopedia | Stephanie Lowe |
| Hyart Theatre | Field Trips | |
| Hyart Theatre | Encyclopedia | Stephanie Lowe |
| Ice Slough | Field Trips | |
| Ice Slough, Oregon Trail landmark | Encyclopedia | WyoHistory.org |
| Independence Rock | Encyclopedia | Will Bagley |
| Independence Rock State Historic Site | Field Trips | |
| Indian Boarding Schools, Wyoming and nationwide | Encyclopedia | Geoffrey O’Gara |
| Indian Citizenship Expedition, 1913 | Encyclopedia | Johanna Wickman |
| Indian geography in Wyoming | Encyclopedia | Gregory Nickerson |
| Indian Reorganization Act | Encyclopedia | WyoHistory.org |
| Indian tribes, trade among | Encyclopedia | Samuel Western |
| Influenza epidemic, 1918, Wyoming | Encyclopedia | Phil Roberts |
| Ingram, Elva, pioneer grave of | Encyclopedia | Randy Brown |
| Interstate 90, planning for | Encyclopedia | Robin Everett |
| Inyan Kara Mountain | Field Trips | |
| Iron Creek Oil Field | Field Trips | |
| Ivinson, Edward, Laramie banker and philanthropist | Encyclopedia | Kim Viner |
| J.C. Penney House | Field Trips | |
| J.C. Penney Mother Store | Field Trips | |
| Jackson Hole Guide | Encyclopedia | Kerry Drake |
| Jackson Hole Historical Society and Museum | Field Trips | |
| Jackson Hole News | Encyclopedia | Kerry Drake |
| Jackson Hole News & Guide | Encyclopedia | Kerry Drake |
| Jackson Hole ski resort | Field Trips | |
| Jackson, William Henry: Foremost Photographer of the American West | Encyclopedia | Rebecca Hein |
| James Reeb Memorial Park | Field Trips | |
| James Reeb mural | Field Trips | |
| James, Verda | Encyclopedia | Wyoming Legislative Service Office |
| Jane, Calamity | Encyclopedia | Rebecca Hein |
| Jenkins, Edna Richards and Thomas, murder of, 1911 | Encyclopedia | Rebecca Hein |
| Jenkins, Theresa, Women’s Suffrage orator and activist | Encyclopedia | MaryJo Birt |
| Jensen, Henry, oral history | Oral Histories | Dana Van Burgh |
| Jewish Farm Families of Huntley, Wyoming | Encyclopedia | Carl V. Hallberg |
| Jim Gatchell Memorial Museum | Field Trips | |
| John Taggart Hinckley Library at Northwest College | Field Trips | |
| Johnson County Library | Field Trips | |
| Johnson County War | Encyclopedia | John W. Davis |
| Johnson County War route | Field Trips | |
| Johnson County, Wyoming | Encyclopedia | Brodie Farquhar |
| Jurors, female, in territorial Wyoming | Encyclopedia | Kim Viner |
| K-N Energy, Casper Star-Tribune and | Encyclopedia | Kerry Drake |
| Kading, Joye Oral History | Oral Histories | Casper College Western History Center |
| Karpan, Kathy, Wyoming secretary of state | Encyclopedia | Sarah Gorin |
| Kelly-Larimer Wagon Train Attack memorial | Field Trips | |
| Kelly-Larimer Wagon Train, 1864 attack on | Encyclopedia | WyoHistory.org |
| Kendall, Paul W., Sheridan-raised U.S. Army general | Encyclopedia | Douglas R. Cubbison |
| Kendrick Mansion | Encyclopedia | Cynde Georgen |
| Kendrick, John B. | Encyclopedia | Cynde Georgen |
| Keyes, Verna | Encyclopedia | Kylie Louise McCormick |
