| Bell, Tom, High Country News editor and publisher | Encyclopedia | Marjane Ambler |
| Bellamy, Mary Godat | Encyclopedia | Wyoming Legislative Service Office |
| Bells of Balangiga | Encyclopedia | Douglas R. Cubbison |
| Bessemer, Wyoming | Encyclopedia | Annette Hein |
| Bessemer, Wyoming | Field Trips | |
| Bicycling in Early Wyoming | Encyclopedia | Lori Van Pelt |
| Bierstadt, Albert: Landscapes of the American West | Encyclopedia | Maria Wimmer |
| Big Boy Steam Engine | Field Trips | |
| Big Horn Academy/Cowley Log Gym | Field Trips | |
| Big Horn and Flying H polo clubs | Field Trips | |
| Big Horn County Courthouse | Field Trips | |
| Big Horn County, Wyoming | Encyclopedia | Rebecca Hein |
| Big Horn River Pilot, early Thermopolis, Wyo. newspaper | Encyclopedia | Rebecca Hein |
| Big Muddy Oil Field | Encyclopedia | Rebecca Hein |
| Big Muddy Oil Field | Field Trips | |
| Big Nose George | Encyclopedia | Lori Van Pelt |
| Big Piney Branch Library | Field Trips | |
| Big Piney, Wyoming | Encyclopedia | Ann Chambers Noble |
| Big Sandy Crossing | Field Trips | |
| Big Sandy Crossing | Encyclopedia | WyoHistory.org |
| Bighorn Basin Geoscience Center | Field Trips | |
| Bighorn Basin, Mormon colonizers in | Encyclopedia | Darcee Barnes |
| Bighorn Basin, Natural History of the | Encyclopedia | Emilene Ostlind |
| Bighorn Canyon National Recreation Area | Field Trips | |
| Bill Barlow’s Budget newspaper | Encyclopedia | Rebecca Hein |
| Bishop, Charles, forty-niner, death and grave of | Encyclopedia | Randy Brown |
| Bissonette family and 1868 wagon train attack | Encyclopedia | Rebecca Hein |
| Black 14 sites on the University of Wyoming campus | Field Trips | |
| Black 14, Hamilton, Mel, former University of Wyoming football player on his life and the | Oral Histories | Phil White |
| Black 14, the | Encyclopedia | Phil White |
| Black Diamond Historic Mine Trail | Field Trips | |
| Black Hills National Forest | Field Trips | |
| Black Thunder Coal Mine | Field Trips | |
| Black, Dr. Willie, Chancellor of the Black Student Alliance in 1969, on the Black 14 | Oral Histories | Wyoming State Archives |
| Blackwater firefighters memorial | Field Trips | |
| Blackwater forest fire, 1937 | Encyclopedia | Kerry Drake |
| Blizzard of 1949 | Encyclopedia | Rebecca Hein |
| Boarding Schools, Indian, in Wyoming and nationwide | Encyclopedia | Geoffrey O’Gara |
| Boissevain, Inez Milholland, suffragist and orator | Encyclopedia | Lesley Wischmann |
| Boysen Dam | Field Trips | |
| Boysen Dam, History of | Encyclopedia | Annette Hein |
| Bozeman Trail | Field Trips | |
| Bozeman Trail Museum | Field Trips | |
| Bozeman Trail sign and marker | Field Trips | |
| Bozeman Trail, brief history | Encyclopedia | Marilyn J. Drew |
| Brazil, Pedro II, emperor of | Encyclopedia | Phil Roberts |
| Bridger Trail | Encyclopedia | James A. Lowe, Wyoming State Historic Preservation Office |
| Bridger Trail through the Bridger Mountains | Field Trips | |
| Bridger Valley Historic Byway | Field Trips | |
| Bridger, Jim | Encyclopedia | James A. Lowe, Wyoming State Historic Preservation Office |
