| High Country News | Encyclopedia | Marjane Ambler |
| High, Dick, Casper Star-Tribune editor | Encyclopedia | Kerry Drake |
| Highland Cemetery | Field Trips | |
| Hill, Henry, Oregon Trail grave of | Encyclopedia | Randy Brown |
| Hill, Nancy Jane, Oregon Trail grave of | Encyclopedia | Randy Brown |
| Historic Downtown Evanston | Field Trips | |
| Hole-in-the-Wall | Field Trips | |
| Hollibaugh, Rachel Walker, Cokeville survivor oral history | Oral Histories | Wyoming State Archives |
| Homesteader Museum | Field Trips | |
| Homsley, Mary, pioneer grave of | Field Trips | |
| Homsley, Mary, pioneer grave of | Encyclopedia | Randy Brown |
| Hoofprints of the Past Museum | Field Trips | |
| Horn, Tom | Encyclopedia | Chip Carlson |
| Horn, Tom - Important sites | Field Trips | |
| Horse Creek Treaty Historical Markers | Field Trips | |
| Horse Creek Treaty, 1851 | Encyclopedia | Lesley Wischmann |
| Hot Springs County, Wyoming | Encyclopedia | Annette Hein |
| Hot Springs State Park | Field Trips | |
| Hot Springs, at Thermopolis, Wyo., sale of by Eastern Shoshone and Northern Arapaho tribes | Encyclopedia | WyoHistory.org |
| Hotel LaBonte | Field Trips | |
| Hotel LaBonte | Encyclopedia | Stephanie Lowe |
| Hotel Wolf | Encyclopedia | Lori Van Pelt |
| Hotel Wolf | Field Trips | |
| Hotel, Mountain View | Encyclopedia | Wyoming State Historic Preservation Office |
| House of Representatives, Wyoming, Riot of 1913 | Encyclopedia | Gregory Nickerson |
| Houx, Frank | Encyclopedia | Wyoming State Archives |
| Hoyt, John | Encyclopedia | Wyoming State Archives |
| Huidekoper, Virginia, Jackson Hole News co-founder | Encyclopedia | Kerry Drake |
| Hulett Museum & Art Gallery | Field Trips | |
| Hunt, Lester | Encyclopedia | Wyoming State Archives |
| Huntington, Gertrude, business manager of Platte Valley Lyre | Encyclopedia | Lori Van Pelt |
| Huntington, Laura, editor and publisher of Platte Valley Lyre | Encyclopedia | Lori Van Pelt |
| Huntley, Wyoming; Jewish Farm Families of | Encyclopedia | Carl V. Hallberg |
| Huxtable Ranch | Encyclopedia | Stephanie Lowe |
| Hyart Theatre | Encyclopedia | Stephanie Lowe |
| Hyart Theatre | Field Trips | |
| 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 Citizenship Expedition, 1913 | Encyclopedia | Johanna Wickman |
| 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 |
| 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 | |
