| Wyoming State Capitol, history of | Encyclopedia | Linda Graves Fabian, Starley Talbott |
| Wyoming State Constitution, women’s suffrage provision in | Encyclopedia | Wyoming State Archives |
| Wyoming State Fair | Field Trips | |
| Wyoming State Geological Survey | Field Trips | |
| Wyoming State Hospital | Field Trips | |
| Wyoming State Hospital, the | Encyclopedia | Barbara Allen Bogart |
| Wyoming State Museum | Field Trips | |
| Wyoming Symphony Orchestra | Encyclopedia | Rebecca Hein |
| Wyoming Territorial Prison | Field Trips | |
| Wyoming Union | Field Trips | |
| Wyoming Veterans Memorial Museum | Field Trips | |
| Wyoming, origins of name | Encyclopedia | Jim Brown |
| Yellowstone Fires,1988 | Encyclopedia | Dan Whipple |
| Yellowstone Forest Reserve | Encyclopedia | John Clayton |
| Yellowstone National Park | Field Trips | |
| Yellowstone National Park, history of | Encyclopedia | Tamsen Emerson Hert |
| Yellowstone National Park, President Chester A. Arthur trip to, 1883 | Encyclopedia | Dick Blust, Jr. |
| Yellowstone National Park, trails of | Encyclopedia | Robert G. and Elizabeth L. Rosenberg |
| Young, Clabe, 1880s rustler | Encyclopedia | Tom Rea |
