| I | Name | Book Title | Author | Vol. # and/or Page # | Call # | Photo |
| Ibsen, Henrik | V. 24 or 1913, p. 593 | 289.35 Y87 | ||||
| Ifft, George Nicholas | History of Idaho | Beal | V.3, p. 9 | 979.6 B362 | ||
| Ikmball, Sophronia Harmon | 979.208 D265 no. 285 | |||||
| Iliff, Thomas Corwin | History of Utah | Whitney | V.4, p. 633 | 979.2 W615h | ||
| Illingworth, Herbert B. | History of Idaho, the Gem of the Mountains | V.3, p. 517 | 979.6 H316 | |||
| Imans, Mrs. Gus | 925 Id1w | |||||
| Imhoff, Edith | 925 Id1w | |||||
| Imick, Albert | 979.208 D265 no. 262 | |||||
| Impey, Samuel | 979.208 D265 no. 258 | |||||
| Ingelow, Jean | V.21 or 1910, p. 212 | 289.35 Y87 | ||||
| Ingelstrom, Bishop Andrew | p. 237 | 925 P943 | ||||
| Inghram, Miles Whitney | History ofIdaho | Beal | V.3, p. 373 | 979.6 B362 | ||
| Ingimundsson, Jon | 979.208 D265 no. 250 | |||||
| Ingraham, Ira Reed | History of Idaho | Beal | V.3, p. 397 | 979.6 B362 | ||
| Ingram, Ann Smith | 979.208 D265 no. 202 | |||||
| Ingram, Elizabeth | 925 Id1w | |||||
| Ingram, John Edward | 979.208 D265 no. 276 | |||||
| Inman, Arthur Charles | History of Idaho | Beal | V.3, p. 87 | 979.6 B362 | ||
| Innes, E. Russell | Utah, a Centennial History | Sutton | V.3, p. 250 | 979.2 Su87 | ||
| Ipson, Anders | 979.208 D265 no. 178 | |||||
| Ipson, Georgina Marie Kjoller | 979.208 D265 no. 242 | |||||
| Ipson, Hans P. | Utah Since Statehood | Warrum | V.4, p. 652 | 979.2 W259 | ||
| Ireton, Charles H. | History of Idaho, the Gem of the Mountains | V.3, p. 645 | 979.6 H316 | |||
| Ireton, John Arthur | History of Idaho, the Gem of the Mountains | V.3, p. 668 | 979.6 H316 | |||
| Ireton, John Harvey | History of Idaho, the Gem of the Mountains | V.3, p. 667 | 979.6 H316 | |||
| Ireton, Samuel | History of Idaho, the Gem of the Mountains | V.3 | 979.6 H316 | |||
| Irish, Newton Bailey | History of Idaho, the Gem of the Mountains | V.3, p. 484 | 979.6 H316 | |||
| Irons, Thomas James | 979.208 D265 no. 258 | |||||
| Irvin, Joe | History of Idaho | Beal | V.3, p. 24 | 979.6 B362 | ||
| Irvin, Marie Isabella Duffield | 925 Id1w | |||||
| Irvin, William Edward | History of Idaho | Beal | V.3, p. 125 | 979.6 B362 | ||
| Irvine, Rosannah Cannon | 979.208 D265 no. 117 | |||||
| Irvine, Thomas | Memories of Early Days in Cache Valley | Ricks | p. 7-8, Jan. 19, 1924 | FILE MS 389 | ||
| Irvine, Thomas | Utah Since Statehood | Warrum | V.4, p. 180 | 979.2 W259 | Yes | |
| Irving, Edward L. | Utah Since Statehood | Warrum | V.3, p. 1011 | 979.2 W259 | ||
| Irving, Washington | V.18 or 1907, p. 380 | 289.35 Y87 | Yes | |||
| Irwin, Carl D. | History of Idaho | Beal | V.3, p. 308 | 979.6 B362 | ||
| Irwin, Charles W. | History of Idaho, the Gem of the Mountains | V.3, p. 99 | 979.6 H316 | |||
| Irwin, Elden | 979.208 D265 no. 51 | |||||
| Irwin, Hon. John N. | History of Idaho Territory | p. 253 | VAULT BK 65 | |||
| 979.6 H629 | ||||||
| Irwin, James | p. 239 | 925 P943 | ||||
| Irwin, Rupert E. | Idaho, the Place and its people | De Fenbach | V.2, p. 439 | 979.62 D361 | ||
| Isaac, Alfred James | History of Idaho | Beal | V.3, p. 67 | 979.6 B362 | ||
| Isaacson, Joseph M. | Idaho, the Place and its People | De Fenbach | V.2, p. 40 | 979.62 D361 | ||
| Isaacson, Thorpe Beal | Utah, a Centennial History | Sutton | V.3, p. 132 | 979.2 Su87 | ||
| Isabella, Queen of Spain | V.21 or 1910, p. 211 | 289.35 Y87 | ||||
| Isakson, Eric J. | Utah Since Statehood | Warrum | V.2, p. 980 | 979.2 W259 | ||
| Isenburg, C. Ray | History of Idaho, the Gem of the Mountains | V.3, p. 227 | 979.6 H316 | |||
| Isgreen, Minnie | 979.208 D265 no. 112 | |||||
| Ish, George H. | History of Idaho, the Gem of the Mountains | V.2, p. 471 | 979.6 H316 | |||
| Isham, A.F. | History of Idaho, the Gem of the Mountains | V.2, p. 554 | 979.6 H316 | |||
| Isom, Alice Parker | 979.208 D265 no. 95 | |||||
| Isom, Alice Parker | 979.208 D265 no. 242 | |||||
| Ison, Owen | 979.208 D265 no. 234 | |||||
| Ituish, O.P. | 979.208 D265 no. 355 | |||||
| Ivers, James (Hon.) | Utah Since Statehood | Warrum | V.2, p. 570 | 979.2 W259 | Yes | |
| Iverson, Carma | MSS 183 | |||||
| Iverson, Don O. | MSS 183 | |||||
| Iverson, Dwayne J. | MSS 183 | |||||
| Iverson, Glen E. | MSS 183 | |||||
| Iverson, Heber C. | V.31 or 1920, p. 147 | 289.35 Y87 | Yes | |||
| Iverson, iver | Utah Since Statehood | Warrum | V.2, p. 684 | 979.2 W259 | ||
| Iverson, Iver Nicholes | 979.208 D265 no. 198 | |||||
| Iverson, Laurel | MSS 183 | |||||
| Iverson, Lynn | MSS 183 | |||||
| Iverson, palmer | MSS 183 | Yes | ||||
| Iverson, Ross N. | MSS 183 | |||||
| Iverson, Ruby | 979.208 D265 no. 213 | |||||
| Iverson, Verl | MSS 183 | |||||
| Iverson, Verl J. | MSS 183 | |||||
| Ivie, James Russell | 979.208 D265 no. 262 | |||||
| Ivins, Anthony W. | V.32 or 1921, p. 264 | 289.35 Y87 | Yes | |||
| Ivins, Anthony W. | p. 130 | 289.392 V26 | Yes | |||
| Ivins, Anthony W. | 979.208 D265 no. 72 | |||||
| Ivins, Anthony Woodward | Utah, the Storied Domain | Alter | V.2, p. 47 | 979.2 AL79u | ||
| Ivins, Julia Anna | 979.208 D265 no. 240 | |||||
| Ivins, Tony | 979.208 D265 no. 134 | |||||
| Ivory, Edward M. | Utah Since Statehood | Warrum | V.3, p. 440 | 979.2 W259 | ||
| Ivory, Mathew | 979.208 D265 no. 206 | |||||
| Ivory, Thomas Martin | Utah Since Statehood | Warrum | V.4, p. 569 | 979.2 W259 |