| Z | Name | Book Title | Author | Vol. # and/or Page # | Call # | Photo |
| Zabriskie, Jerome | 979.208 D265 no. 169 | |||||
| Zahnd, John | 979.208 D265 no. 60 | |||||
| Zalinski, Edward R. | Utah Since Statehood | Warrum | V.3, p. 106 | 979.2 W259 | ||
| Zane, Charles S. | 979.208 D265 no. 110 | |||||
| Zaring, Ezra E. | History of Idaho, the Gem of the Mountains | V.3, p. 880 | 979.6 H316 | |||
| Zeese, George | Utah, a Centennial History | Sutton | V.3, p. 207 | 979.2 Su87 | ||
| Zehner, Mary | p. 166 | 925 K634i | Yes | |||
| Zeilor, Joseph D. | History of Idaho, the Gem of the Mountains | V.4, p. 107 | 979.6 H316 | |||
| Zeller, Charles F. M.D. | Idaho, the Place and its People | De Fenbach | V.2, p 189 | 979.62 D361 | ||
| Zener, Arthur E. | Idaho, the Place and its People | De Fenbach | V.2, p. 348 | 979.62 D361 | ||
| Zener, Mmilton E. | Idaho, the Place and its people | De Fenbach | V.2, p. 350 | 979.62 D361 | ||
| Zimmerman, Beulah | 925 Id1w | |||||
| Zimmerman, George F. | History of Idaho, the Gem of the Mountains | V.2, p. 406 | 979.6 H316 | |||
| Zimmerman, Mrs. Mary Ann (Pyle) | History of Idaho, the Gem of the Mountains | V.3, p. 383 | 979.6 H316 | |||
| Zimmerman, William | History of Idaho, the Gem of the Mountains | V.3, p. 383 | 979.6 H316 | |||
| Zinck, Erving | MSS 183 | |||||
| Zinck, Lee | MSS 183 | |||||
| Zollinger, Jacob | Utah Since Statehood | Warrum | V.4, p. 550 | 979.2 W259 | Yes | |
| Zollitsh, Helen Lennert | p. 167 | 925 K634i | Yes | |||
| Zuchi, Angelica Kaufman | V.21 or 1910, p. 504 | 289.35 Y87 | ||||
| Zumwalt, Mary | p. 168 | 925 K634i | Yes | |||
| Zundal, Joseph M. | Utah Since Statehood | Warrum | V.4, p. 461 | 979.2 W259 | ||
| Zundle, Josephine Hartley | 979.208 D265 no. 273 | |||||
| Zundel, Myron A. | History of Idaho | Beal | V.3, p. 252 | 979.6 B362 |