| Grattan Fight | Encyclopedia | Douglas R. Cubbison |
| Grattan Fight Monument | Field Trips | |
| Grattan Massacre | Encyclopedia | Douglas R. Cubbison |
| Grazing leases, federal | Encyclopedia | Russel L. Tanner |
| Great Divide Mountain Bike Route | Field Trips | |
| Green River Basin natural history | Encyclopedia | Emilene Ostlind |
| Green River Rendezvous | Field Trips | |
| Green River Valley Museum | Field Trips | |
| Green River, Wyoming | Encyclopedia | Terry A. Del Bene |
| Greybull Hotel | Field Trips | |
| Greybull Hotel | Encyclopedia | Stephanie Lowe |
| Greybull Museum | Field Trips | |
| Grindstone Butte | Encyclopedia | WyoHistory.org |
| Guernsey Dam | Field Trips | |
| Guernsey Dam, History of | Encyclopedia | The National Park Service |
| Guernsey State Park | Encyclopedia | WyomingHeritage.org, Wyoming State Historic Preservation Office |
| Guernsey State Park | Field Trips | |
| Guinard’s Bridge, North Platte River | Encyclopedia | WyoHistory.org |
| Hague, Arnold | Encyclopedia | John Clayton |
| Hale, William | Encyclopedia | Wyoming State Archives |
| Hamilton, Mel, former University of Wyoming football player on his life and the Black 14 | Oral Histories | Phil White |
| Ham’s Fork Crossing, Oregon/California Trail | Encyclopedia | Randy Brown |
| Hanna Basin Museum | Field Trips | |
| Hanna Mine Disasters, One Family’s Story | Encyclopedia | Tom Rea |
| Hanna Miners’ Monuments, war memorials and a steam locomotive | Field Trips | |
| Hanna, Wyoming | Encyclopedia | Nancy Anderson |
| Hansen, Clifford | Encyclopedia | Wyoming State Archives |
| Hansen, Clifford - interview | Oral Histories | Wyoming State Archives |
| Hardin, William Jefferson | Encyclopedia | Lori Van Pelt |
| Hartley, Ron, Cokeville survivor oral history | Oral Histories | Wyoming State Archives |
| Haskell, Rich Cokeville, survivor oral history | Oral Histories | Jessica Clark |
| Hatch, Charles, California Trail emigrant | Encyclopedia | Randy Brown |
| Hathaway, Stanley | Encyclopedia | Wyoming State Archives |
| Hathaway, Stanley - interview | Oral Histories | Wyoming State Archives |
| Hayford, James H., editor of the Laramie Sentinel | Encyclopedia | Judy Knight |
| Haystack Butte | Field Trips | |
| Haystack Butte, Oregon Trail landmark | Encyclopedia | Randy Brown |
| Heart Mountain Interpretive Center | Field Trips | |
| Heart Mountain Relocation Center, a Brief History of | Encyclopedia | Steven Bingo |
| Heath, Dr. Lillian | Encyclopedia | Lori Van Pelt |
| Hebard, Grace Raymond, historian | Encyclopedia | Mike Mackey |
| Hecht, Frances, on Early Housework in the Bighorn Basin | Oral Histories | Washakie Museum and Cultural Center |
| Hemingway, Ernest, in Wyoming | Encyclopedia | Jamie Egolf, Chavawn Kelley |
| Herrera, Clayvin, Crow off-reservation hunting rights and | Encyclopedia | John Clayton |
| Herschler, Ed | Encyclopedia | Wyoming State Archives |
| Herschler, Ed - interview | Oral Histories | Wyoming State Archives |
| Hickey, Joseph | Encyclopedia | Wyoming State Archives |
| High Country News | Encyclopedia | Marjane Ambler |
| High, Dick, Casper Star-Tribune editor | Encyclopedia | Kerry Drake |
| Highland Cemetery | Field Trips | |
