Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Iglesia del Pacto Evangelico de Turlock | Church | 31 | Stanislaus | 37 29 26 N | 120 51 05 W |
| Iglesia del Valle | Church | -7 | Riverside | 33 42 44 N | 116 12 29 W |
| Iglesia el Espiritu Santo | Church | 30 | Santa Clara | 37 19 30 N | 121 53 49 W |
| Iglesia Emmanuel | Church | 144 | Tulare | 36 03 45 N | 119 00 00 W |
| Iglesia Evangelica | Church | 217 | San Luis Obispo | 35 37 40 N | 120 41 11 W |
| Iglesia Evangelica Bethel | Church | | Los Angeles | 34 11 02 N | 118 23 15 W |
| Iglesia Evangelica Cristo | Church | 325 | San Bernardino | 34 04 47 N | 117 37 12 W |
| Iglesia Evangelica de Rios | Church | 245 | Riverside | 33 56 44 N | 117 24 45 W |
| Iglesia Evangelica Encuento | Church | 101 | Kern | 35 28 40 N | 119 16 48 W |
| Iglesia Evangelica Rio De Agua Viva | Church | 88 | Fresno | 36 45 06 N | 119 48 03 W |
| Iglesia Faro De Luz Pentecoste | Church | | Los Angeles | 34 06 34 N | 118 01 06 W |
| Iglesia Fuente De Salvacion | Church | | Contra Costa | 37 58 16 N | 122 20 53 W |
| Iglesia Fuente De Vida | Church | | Los Angeles | 34 12 29 N | 118 22 26 W |
| Iglesia Gentil De Cristo | Church | 28 | Butte | 39 21 32 N | 121 41 52 W |
| Iglesia Hispania Pentecostal | Church | 359 | San Bernardino | 34 07 47 N | 117 18 48 W |
| Iglesia La Cosecha | Church | | Los Angeles | 34 05 00 N | 117 57 56 W |
| Iglesia La Luz Del Mundo | Church | 93 | Fresno | 36 44 46 N | 119 46 25 W |
| Iglesia la Luz del Mundo | Church | 424 | San Bernardino | 34 03 04 N | 117 10 52 W |
| Iglesia la Luz del Mundo | Church | 65 | Santa Barbara | 34 57 03 N | 120 26 30 W |
| Iglesia La Resurrection | Church | 20 | Los Angeles | 33 53 55 N | 118 21 11 W |
| Iglesia Latina Emmanuel | Church | 201 | San Diego | 33 07 08 N | 117 04 41 W |
| Iglesia Lutherana San Pablo | Church | | Los Angeles | 34 12 18 N | 118 22 43 W |
| Iglesia Methodista Libre | Church | 63 | Los Angeles | 34 00 27 N | 118 06 15 W |
| Iglesia Metodista (historical) | Church | 19 | Santa Clara | 37 23 56 N | 122 04 54 W |
| Iglesia Metodista Unida de Pajaro | Church | 24 | Santa Cruz | 36 55 21 N | 121 45 27 W |
| Iglesia Misionera | Church | 22 | Santa Clara | 37 21 26 N | 121 53 23 W |
| Iglesia Mission de Jesus Cristo | Church | 203 | Riverside | 33 52 40 N | 117 31 20 W |
| Iglesia Missionera Antiquia | Church | | Los Angeles | 34 13 11 N | 118 21 55 W |
| Iglesia Ni Cristo | Church | | Los Angeles | 34 04 22 N | 117 58 26 W |
| Iglesia Ni Cristo | Church | 258 | Riverside | 33 59 23 N | 117 22 36 W |
| Iglesia Ni Cristo | Church | 29 | Ventura | 34 13 51 N | 119 09 25 W |
| Iglesia Nueva Vida | Church | 269 | Los Angeles | 34 09 10 N | 118 08 44 W |
| Iglesia Nuevas de Gozo | Church | 22 | Los Angeles | 33 56 16 N | 118 21 16 W |
| Iglesia Palabra Y Poder | Church | | Los Angeles | 33 59 15 N | 118 25 25 W |
| Iglesia Pan-American Foursquare Church | Church | 63 | Los Angeles | 34 01 16 N | 118 11 33 W |
| Iglesia Pentecostal | Church | | Los Angeles | 34 05 35 N | 117 58 08 W |
| Iglesia Pentecostes Juan 14:6 | Church | | Los Angeles | 34 11 46 N | 118 23 33 W |
| Iglesia Presbiteriana el Redento | Church | 123 | Kern | 35 21 55 N | 118 58 52 W |
| Iglesia Presbiteriana Hispana | Church | 68 | San Diego | 32 43 05 N | 117 08 11 W |
| Iglesia Pueble de Dios | Church | 28 | Santa Barbara | 34 38 39 N | 120 28 11 W |
| Iglesia Restaurancion Cristiana | Church | 151 | Kern | 35 22 34 N | 118 57 03 W |
| Iglesia Santa Pentecostes Templo | Church | 25 | Santa Cruz | 36 55 23 N | 121 45 32 W |
| Iglesia Sion | Church | 18 | San Francisco | 37 45 10 N | 122 24 52 W |
| Iglesia Sol De Justicia | Church | | Los Angeles | 34 14 09 N | 118 22 00 W |
| Iglesia Unida En Cristo | Church | 236 | Riverside | 33 59 53 N | 117 24 36 W |
| Iglesia Union Camino Mejor | Church | 235 | Riverside | 33 59 49 N | 117 24 32 W |
| Iglesia Universal del Reino | Church | 110 | San Diego | 32 44 58 N | 117 06 51 W |
| Iglesia Vigilancia Cristiana | Church | | Alameda | 37 37 37 N | 122 04 01 W |
| Ignacio | Populated Place | 9 | Marin | 38 04 13 N | 122 32 19 W |
| Ignacio Center Shopping Center | Locale | 9 | Marin | 38 04 08 N | 122 32 28 W |
| Ignacio Mine | Mine | 2422 | Inyo | 36 31 59 N | 117 48 06 W |
| Ignacio Valenica High School | School | 101 | Kern | 35 46 56 N | 119 13 58 W |
| Ignacio Valley Preserve | Park | 207 | Marin | 38 03 10 N | 122 34 11 W |
| Ignatius Heights | Summit | 107 | San Francisco | 37 46 35 N | 122 27 04 W |
| Igo | Populated Place | 332 | Shasta | 40 30 20 N | 122 32 30 W |
| Igo-Ono Elementary School | School | 327 | Shasta | 40 30 12 N | 122 32 28 W |
| Ike Dye Hill | Summit | 1338 | Butte | 40 05 25 N | 121 37 09 W |
| Ikes Creek | Stream | | Humboldt | 41 21 46 N | 123 29 37 W |
| Ikes Creek | Stream | | Siskiyou | 41 51 45 N | 122 07 51 W |
| Ikes Creek | Stream | | Siskiyou | 41 49 57 N | 123 23 00 W |
| Ikes Flat | Flat | 1500 | Siskiyou | 41 52 19 N | 122 08 17 W |
| Ikes Mountain | Summit | 1672 | Siskiyou | 41 52 23 N | 122 08 56 W |
| Illa Collin Park | Park | 13 | Sacramento | 38 27 13 N | 121 22 49 W |
| Illilouette Creek | Stream | | Mariposa | 37 43 33 N | 119 33 25 W |
| Illilouette Falls | Falls | 1702 | Mariposa | 37 42 50 N | 119 33 43 W |
| Illilouette Gorge | Valley | | Mariposa | 37 43 26 N | 119 33 27 W |
| Illilouette Ridge | Ridge | 2514 | Mariposa | 37 41 52 N | 119 34 41 W |
| Illinois Canyon | Valley | | El Dorado | 38 55 49 N | 120 51 31 W |
| Illinois Creek | Stream | | Sierra | 39 41 56 N | 120 50 16 W |
| Illinois Hill | Summit | 507 | Mariposa | 37 19 54 N | 120 00 48 W |
| Illinois Ridge | Ridge | 1508 | Plumas | 39 39 42 N | 120 58 28 W |
| Illinois School (historical) | School | 11 | Sutter | 38 52 56 N | 121 32 36 W |
| Illinoistown (historical) | Populated Place | 695 | Placer | 39 05 18 N | 120 57 24 W |
| Ilmon | Populated Place | 309 | Kern | 35 18 45 N | 118 41 38 W |
| Imhoff | Populated Place | 90 | Tulare | 36 12 52 N | 119 19 51 W |
| Immaculate Conception Academy | School | 42 | San Francisco | 37 45 04 N | 122 25 25 W |
| Immaculate Conception Catholic Church | Church | 359 | Amador | 38 23 45 N | 120 48 23 W |
| Immaculate Conception Church | Church | | Los Angeles | 34 08 38 N | 117 59 25 W |
| Immaculate Conception Church | Church | 14 | San Diego | 32 45 12 N | 117 11 43 W |
| Immaculate Conception Elementary School (historical) | School | 8 | Sacramento | 38 33 18 N | 121 28 12 W |
| Immaculate Conception Home for Girls | Building | 220 | Los Angeles | 34 05 42 N | 118 16 17 W |
| Immaculate Conception Parish Center | Church | 88 | Los Angeles | 34 03 03 N | 118 16 19 W |
| Immaculate Conception Roman Catholic Church | Church | 83 | Tehama | 39 55 42 N | 122 10 34 W |
| Immaculate Conception School | School | 86 | Los Angeles | 34 03 02 N | 118 16 16 W |
| Immaculate Conception School | School | 174 | Los Angeles | 34 08 40 N | 117 59 25 W |
| Immaculate Conception School | School | 311 | San Bernardino | 34 04 39 N | 117 19 17 W |
| Immaculate Heart College | School | 160 | Santa Barbara | 34 26 53 N | 119 37 27 W |
| Immaculate Heart College (historical) | School | 160 | Los Angeles | 34 06 26 N | 118 18 35 W |
| Immaculate Heart Hospital | Hospital | 17 | Monterey | 36 39 44 N | 121 38 52 W |
| Immaculate Heart of Mary Catholic Church | Church | 442 | San Diego | 33 02 40 N | 116 51 37 W |
| Immaculate Heart of Mary Church | Church | 102 | Los Angeles | 34 05 26 N | 118 17 51 W |
| Immaculate Heart of Mary Church | Church | | Orange | 33 44 00 N | 117 53 55 W |
| Immaculate Heart of Mary Elementary School | School | 46 | San Mateo | 37 30 42 N | 122 17 40 W |
| Immaculate Heart of Mary Novitiate (historical) | School | 124 | Santa Barbara | 34 26 41 N | 119 37 25 W |
| Immaculate Heart of Mary School | School | 101 | Los Angeles | 34 05 25 N | 118 17 52 W |
| Immaculate Heart of Mary School | School | 20 | Orange | 33 44 03 N | 117 53 58 W |
| Immaculate Temple of God Church | Church | 10 | Sacramento | 38 37 49 N | 121 26 46 W |
| Immanuel Academy | School | 104 | Fresno | 36 35 14 N | 119 27 24 W |
| Immanuel Baptist Church | Church | 6 | Alameda | 37 46 27 N | 122 16 34 W |
| Immanuel Baptist Church | Church | 20 | Alameda | 37 49 36 N | 122 16 08 W |
| Immanuel Baptist Church | Church | | Alameda | 37 52 52 N | 122 17 00 W |
| Immanuel Baptist Church | Church | 99 | Kern | 35 47 25 N | 119 14 18 W |
| Immanuel Baptist Church | Church | 127 | Los Angeles | 34 03 56 N | 118 09 09 W |
| Immanuel Baptist Church | Church | 17 | Los Angeles | 33 46 06 N | 118 09 15 W |
| Immanuel Baptist Church | Church | | Los Angeles | 34 08 48 N | 118 15 54 W |
| Immanuel Baptist Church | Church | 16 | Sacramento | 38 35 59 N | 121 24 54 W |
| Immanuel Baptist School | School | 399 | San Bernardino | 34 07 13 N | 117 11 02 W |
| Immanuel Baptist Temple | Church | 309 | Riverside | 34 01 06 N | 117 19 23 W |
| Immanuel Christian Assembly Church | Church | 68 | Los Angeles | 34 02 11 N | 118 16 22 W |
| Immanuel Christian Reformed Church | Church | 20 | San Joaquin | 37 44 08 N | 121 07 49 W |