| U | Name | Book Title | Author | Vol. # and/or Page # | Call # | Photo |
| Udahll, David | 979.208 D265 no. 233 | |||||
| Udall, Ruth Kimball | V.26 or 1915, p. 638 | 289.35 Y87 | Yes | |||
| Ueno, Iwajiro | Utah Since Statehood | Warrum | V.4, p. 419 | 979.2 W259 | ||
| Uglem, Harold Arnold | History of Utah | Beal | V.3, p. 104 | 979.6 B362 | ||
| Uhrig, William Henry | History of Idaho, the Gem of the Mountains | V.3, p. 536 | 979.6 H316 | |||
| Ullman, Rena | 925 Id1w | |||||
| Ullrich, Charels John | Utah Since Statehood | Warrum | V.4, p. 588 | 979.2 W259 | ||
| Ulmer, Thomas E. | History of Idaho, the Gem of the Mountains | V.4, p. 327 | 979.6 H316 | |||
| Ulmer, William A. | History of Idaho, the Gem of the Mountains | V.4, p. 572 | 979.6 H316 | |||
| Ulcan, Herman Juel | History of Idaho | Beal | V.3, p. 225 | 979.6 B362 | ||
| Una, Arthur William | History of Idaho | Beal | V.3, p. 374 | 979.6 B362 | ||
| Una, Robert John | History of Idaho | Beal | V.3, p. 436 | 979.6 B362 | ||
| Underwood, Annie | 979.208 D265 no. 160 | |||||
| Underwood, John L. | p. 444 | 925 P943 | ||||
| Upson, Warren | 979.208 D265 no. 212 | |||||
| Uranga, Antonio | History of Idaho, the Gem of the Mountains | V.3, p. 388 | 979.6 H316 | |||
| Ure, James W. | Utah Since Statehood | Warrum | V.2, p. 892 | 979.2 W259 | Yes | |
| Uren, Elizabeth | 979.208 D265 no. 184 | |||||
| Utsch, John | V.3, p. 34-35 | 979.62 D361 | ||||
| Utter, Stephen | History of Idaho, the Gem of the Mountains | V.2, p. 98 | 979.6 H316 |