| Name | What | Region | Country | Lat | Long | Elev Ft. | Pop Est |
|---|
| J Diamond Trailer and Recreational Vehicle Park subdivision | city | California | United States | 37.36778 | -118.39722 | 4199 | 7485 |
| Jacinto | city | California | United States | 39.58111 | -122.00556 | 98 | 1071 |
| Jacksnipe | city | California | United States | 38.19278 | -122.06694 | 3 | 13632 |
| Jackson | city | California | United States | 38.34889 | -120.77306 | 1397 | 4501 |
| Jacobs Corner | city | California | United States | 38.67167 | -121.89333 | 118 | 813 |
| Jacobsen historical | city | California | United States | 39.00556 | -120.38444 | 6036 | 351 |
| Jacumba | city | California | United States | 32.6175 | -116.18889 | 2831 | 11768 |
| Jalama | city | California | United States | 34.49806 | -120.49361 | 396 | 298 |
| Jalama historical | city | California | United States | 34.51028 | -120.49806 | 118 | 714 |
| Jamacha | city | California | United States | 32.74167 | -116.91056 | 587 | 35880 |
| Jamacha Junction | city | California | United States | 32.73972 | -116.9425 | 331 | 94865 |
| James | city | California | United States | 39.65333 | -121.54861 | 1174 | 4425 |
| Jamesan | city | California | United States | 36.72 | -120.20889 | 170 | 1251 |
| Jamesburg | city | California | United States | 36.36972 | -121.58917 | 1968 | 1446 |
| Jamestown | city | California | United States | 37.95333 | -120.42167 | 1407 | 5580 |
| Jamison historical | city | California | United States | 39.77611 | -120.68111 | 5055 | 187 |
| Jamul | city | California | United States | 32.71694 | -116.87528 | 1020 | 35880 |
| Jamul Indian Village | city | California | United States | 32.70583 | -116.87056 | 892 | 3974 |
| Janes Place | city | California | United States | 40.78944 | -123.71556 | 3136 | 501 |
| Janesville | city | California | United States | 40.29667 | -120.52306 | 4251 | 1941 |
| Jarvis Landing | city | California | United States | 37.52944 | -122.0625 | 45 | 83706 |
| Jasmin | city | California | United States | 35.74278 | -119.14389 | 462 | 1485 |
| Jastro | city | California | United States | 35.37667 | -119.07139 | 390 | 102504 |
| Java | city | California | United States | 34.8875 | -114.72639 | 1138 | 458 |
| Jayhawk | city | California | United States | 38.73139 | -120.96528 | 1204 | 14520 |
| Jefferson | city | California | United States | 34.01833 | -118.27111 | 187 | 821745 |
| Jefferson Park | city | California | United States | 34.02722 | -118.31667 | 173 | 810796 |
| Jellico | city | California | United States | 40.845 | -121.29167 | 5203 | 200 |
| Jenks Place | city | California | United States | 39.70861 | -122.84722 | 5531 | 104 |
| Jenner | city | California | United States | 38.44972 | -123.11444 | 3 | 699 |
| Jenny Lind | city | California | United States | 38.095 | -120.86889 | 298 | 2041 |
| Jerome | city | California | United States | 41.73167 | -121.99917 | 4347 | 159 |
| Jerseydale | city | California | United States | 37.56361 | -119.85639 | 3795 | 910 |
| Jesbel historical | city | California | United States | 37.14972 | -119.95222 | 600 | 1041 |
| Jesmond Dene | city | California | United States | 33.18028 | -117.10833 | 997 | 68462 |
| Jesus Maria | city | California | United States | 38.28556 | -120.64639 | 1601 | 1847 |
| Jet | city | California | United States | 37.43278 | -121.09889 | 111 | 8283 |
| Jewell | city | California | United States | 38.03667 | -122.74472 | 196 | 2308 |
| Jim Leggett Place | city | California | United States | 39.86278 | -123.41944 | 2080 | 193 |
| Jimgrey | city | California | United States | 34.97694 | -117.46667 | 2417 | 210 |
| Jims Camp | city | California | United States | 41.83306 | -122.58472 | 2575 | 835 |
| Jimtown | city | California | United States | 38.66667 | -122.81861 | 196 | 4142 |
| Joes Landing | city | California | United States | 38.78 | -121.6025 | 19 | 3317 |
| Joesphine | city | California | United States | 39.09417 | -121.8 | 29 | 735 |
| Jofegan | city | California | United States | 33.315 | -117.33139 | 196 | 22266 |
| Johannesburg | city | California | United States | 35.37278 | -117.63389 | 3549 | 241 |
| Johnson Corner | city | California | United States | 34.30722 | -117.75167 | 3923 | 110 |
| Johnson Park | city | California | United States | 40.91778 | -121.62611 | 3195 | 439 |
| Johnsondale | city | California | United States | 35.97472 | -118.54 | 4763 | 117 |
| Johnsons | city | California | United States | 41.35056 | -123.87083 | 200 | 238 |
| Johnston Corner | city | California | United States | 36.92861 | -121.70417 | 49 | 17045 |
| Johnstons Corner | city | California | United States | 34.83028 | -117.17944 | 2290 | 2869 |
| Johnstonville | city | California | United States | 40.38444 | -120.58639 | 4143 | 2631 |
| Johnstown | city | California | United States | 32.83806 | -116.89583 | 698 | 81675 |
| Johnsville | city | California | United States | 39.76083 | -120.69444 | 5590 | 187 |
| Johnsville Mobile Home Park subdivision | city | California | United States | 37.40861 | -121.89583 | 65 | 212853 |
| Jolon | city | California | United States | 35.97083 | -121.175 | 925 | 397 |
| Jonata Park | city | California | United States | 34.65111 | -120.18333 | 606 | 4052 |
| Jones Bar historical | city | California | United States | 39.29389 | -121.10861 | 1377 | 2429 |
| Jones Corner | city | California | United States | 36.06583 | -119.10611 | 393 | 19149 |
| Jones Place | city | California | United States | 38.84972 | -120.36944 | 5016 | 271 |
| Jonesville | city | California | United States | 40.1125 | -121.46611 | 5196 | 866 |
| Jordan Downs subdivision | city | California | United States | 33.94778 | -118.23306 | 98 | 619971 |
| Jordan Park subdivision | city | California | United States | 37.78472 | -122.45556 | 347 | 616872 |
| Joshua | city | California | United States | 35.27111 | -115.44861 | 3999 | 70 |
| Joshua Tree | city | California | United States | 34.13472 | -116.31222 | 2752 | 6346 |
| Jovista | city | California | United States | 35.7975 | -119.18194 | 400 | 8508 |
| Juan | city | California | United States | 35.36639 | -115.08722 | 4202 | 121 |
| Julian | city | California | United States | 33.07861 | -116.60111 | 4396 | 500 |
| Junction Camp | city | California | United States | 34.73167 | -119.97917 | 3366 | 1183 |
| Junction City | city | California | United States | 40.73333 | -123.0525 | 1630 | 150 |
| Junction House | city | California | United States | 39.74056 | -121.29083 | 3369 | 421 |
| Junction House | city | California | United States | 39.31667 | -120.81 | 4399 | 3309 |
| Junction Ranch | city | California | United States | 36.07389 | -117.51194 | 5846 | 56 |
| June Lake | city | California | United States | 37.77972 | -119.07444 | 7972 | 131 |
| June Lake Junction | city | California | United States | 37.8125 | -119.05333 | 7939 | 84 |
| Juniper | city | California | United States | 41.48 | -120.57167 | 4340 | 652 |
| Juniper Hills | city | California | United States | 34.44417 | -117.93444 | 4494 | 1353 |
| Juniper Springs | city | California | United States | 33.76611 | -117.08333 | 2194 | 20251 |
| Jupiter | city | California | United States | 38.1225 | -120.28167 | 2913 | 1520 |
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