| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Black Bear | city | California | United States | 41.24 | -123.18 | 3500 | |
| Black Butte | city | California | United States | 41.39 | -122.36 | 4189 | |
| Black Forest | city | California | United States | 40.26 | -121.38 | 5029 | |
| Black Jack Bluffs | city | California | United States | 37.89 | -120.58 | 1000 | |
| Black Meadow Landing | city | California | United States | 34.35 | -114.20 | 830 | |
| Black Oak Estates | city | California | United States | 38.04 | -120.23 | 3638 | |
| Black Oaks | city | California | United States | 38.83 | -122.83 | 2014 | |
| Black Point | city | California | United States | 38.11 | -122.51 | 3 | |
| Blackhawk | city | California | United States | 37.82 | -121.91 | 1085 | |
| Blackhawk-Camino Tassajara | city | California | United States | 37.82 | -121.91 | 1085 | |
| Blackrock | city | California | United States | 36.93 | -118.23 | 4189 | |
| Blackslough Landing | city | California | United States | 37.99 | -121.42 | 3 | |
| Blackwells Corner | city | California | United States | 35.61 | -119.87 | 830 | |
| Blairsden | city | California | United States | 39.78 | -120.62 | 4435 | |
| Blakes Landing | city | California | United States | 38.19 | -122.92 | 36 | |
| Blanchard | city | California | United States | 37.73 | -120.33 | 1669 | |
| Blanco | city | California | United States | 36.04 | -119.51 | 200 | |
| Blanco | city | California | United States | 36.68 | -121.74 | 39 | |
| Blavo | city | California | United States | 39.57 | -121.73 | 137 | |
| Blinzing (historical) | city | California | United States | 39.71 | -121.41 | 830 | |
| Bliss (historical) | city | California | United States | 39.27 | -121.60 | 78 | |
| Blocksburg | city | California | United States | 40.28 | -123.64 | 1236 | |
| Bloomer (historical) | city | California | United States | 39.62 | -121.49 | 830 | |
| Bloomfield | city | California | United States | 38.31 | -122.85 | 131 | |
| Bloomington | city | California | United States | 34.07 | -117.40 | 1036 | |
| Blossom Valley | city | California | United States | 32.86 | -116.86 | 1000 | |
| Blossom Valley | city | California | United States | 37.37 | -122.09 | 164 | |
| Blue Canyon | city | California | United States | 39.26 | -120.71 | 5029 | |
| Blue Hills | city | California | United States | 37.29 | -122.03 | 341 | |
| Blue Jay | city | California | United States | 34.25 | -117.21 | 5259 | |
| Blue Lake | city | California | United States | 40.88 | -123.98 | 200 | |
| Blue Lake Junction | city | California | United States | 38.26 | -120.33 | 4189 | |
| Blue Lake Springs | city | California | United States | 38.26 | -120.32 | 4235 | |
| Blue Tent | city | California | United States | 39.31 | -120.97 | 3349 | |
| Bluegum | city | California | United States | 39.58 | -122.19 | 141 | |
| Bluewater | city | California | United States | 34.17 | -114.27 | 396 | |
| Bluff Heights | city | California | United States | 33.77 | -118.16 | 3 | |
| Bluff Park | city | California | United States | 33.76 | -118.16 | 3 | |
| Blumenberg (historical) | city | California | United States | 38.05 | -121.71 | 3 | |
| Blunt | city | California | United States | 40.24 | -122.29 | 406 | |
| Bly | city | California | United States | 33.99 | -117.49 | 830 | |
| Blythe | city | California | United States | 33.61 | -114.60 | 265 | |
| Blythe Marina Mobile Estates | city | California | United States | 33.61 | -114.53 | 259 |