51 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| San Bernardino | 1 | 225,439 | 222,119 | 0.3% | 3,630 | 62 | City |
| Fontana | 2 | 220,772 | 209,186 | 1.06% | 5,101 | 43 | City |
| Ontario | 3 | 187,675 | 175,723 | 1.29% | 3,755 | 50 | City |
| Rancho Cucamonga | 4 | 177,174 | 174,678 | 0.28% | 3,809 | 47 | City |
| Victorville | 5 | 142,221 | 134,721 | 1.07% | 1,929 | 74 | City |
| Rialto | 6 | 105,156 | 103,963 | 0.23% | 4,365 | 24 | City |
| Hesperia | 7 | 102,303 | 99,966 | 0.46% | 1,408 | 73 | City |
| Chino | 8 | 94,751 | 91,046 | 0.79% | 3,204 | 30 | City |
| Upland | 9 | 79,843 | 79,047 | 0.2% | 5,123 | 16 | City |
| Chino Hills | 10 | 77,158 | 78,457 | -0.34% | 1,728 | 45 | City |
| Apple Valley | 11 | 74,821 | 75,858 | -0.28% | 972 | 77 | Town |
| Redlands | 12 | 74,537 | 73,244 | 0.35% | 2,070 | 36 | City |
| Highland | 13 | 56,380 | 56,975 | -0.21% | 3,036 | 19 | City |
| Yucaipa | 14 | 54,429 | 54,607 | -0.07% | 1,926 | 28 | City |
| Colton | 15 | 53,416 | 53,974 | -0.21% | 3,418 | 16 | City |
| Adelanto | 16 | 37,898 | 38,110 | -0.11% | 717 | 53 | City |
| Montclair | 17 | 37,576 | 37,946 | -0.2% | 6,794 | 6 | City |
| Twentynine Palms | 18 | 26,188 | 28,060 | -1.41% | 446 | 59 | City |
| Loma Linda | 19 | 25,266 | 24,918 | 0.27% | 2,892 | 9 | City |
| Barstow | 20 | 24,768 | 25,411 | -0.52% | 600 | 41 | City |
| Bloomington | 21 | 22,851 | 21,907 | -0.29% | 3,764 | 6 | CDP |
| Yucca Valley | 22 | 21,881 | 21,766 | 0.11% | 549 | 40 | Town |
| Phelan | 23 | 19,264 | 19,038 | 1.75% | 321 | 60 | CDP |
| Grand Terrace | 24 | 12,935 | 13,155 | -0.34% | 3,672 | 4 | City |
| Big Bear City | 25 | 12,865 | 12,621 | 0.29% | 402 | 32 | CDP |
| Muscoy | 26 | 12,092 | 11,546 | 0.81% | 3,976 | 3 | CDP |
| Mentone | 27 | 9,954 | 10,141 | 0.83% | 1,629 | 6 | CDP |
| Lake Arrowhead | 28 | 9,630 | 9,741 | -1.89% | 545 | 18 | CDP |
| Fort Irwin | 29 | 8,997 | 9,573 | 0.11% | 1,292 | 7 | CDP |
| Crestline | 30 | 8,976 | 9,351 | -1.32% | 646 | 14 | CDP |
| Spring Valley Lake | 31 | 8,900 | 8,408 | 0.51% | 2,943 | 3 | CDP |
| Oak Hills | 32 | 7,578 | 10,415 | -1.12% | 309 | 25 | CDP |
| Piñon Hills | 33 | 7,128 | 6,937 | -0.14% | 222 | 32 | CDP |
| Joshua Tree | 34 | 6,585 | 7,786 | -0.83% | 182 | 36 | CDP |
| Lucerne Valley | 35 | 6,312 | 5,694 | 0.53% | 60 | 106 | CDP |
| Silver Lakes | 36 | 5,509 | 6,050 | -0.15% | 1,053 | 5 | CDP |
| Big Bear Lake | 37 | 5,044 | 5,042 | 0% | 808 | 6 | City |
| Needles | 38 | 4,815 | 4,932 | -0.5% | 157 | 31 | City |
| Running Springs | 39 | 4,521 | 4,410 | -0.51% | 1,075 | 4 | CDP |
| Wrightwood | 40 | 4,445 | 4,362 | -0.11% | 747 | 6 | CDP |
| Lenwood | 41 | 4,134 | 4,431 | 0.95% | 1,987 | 2 | CDP |
| Mountain View Acres | 42 | 3,539 | 3,698 | 0.77% | 2,227 | 2 | CDP |
| Morongo Valley | 43 | 3,346 | 3,166 | -0.42% | 133 | 25 | CDP |
| San Antonio Heights | 44 | 3,275 | 3,113 | -0.18% | 1,339 | 2 | CDP |
| Homestead Valley | 45 | 2,424 | 2,619 | -1.66% | 72 | 34 | CDP |
| Searles Valley | 46 | 1,710 | 1,647 | -0.12% | 163 | 10 | CDP |
| Yermo | 47 | 1,226 | 1,082 | 7.17% | 1,889 | 1 | CDP |
| Big River | 48 | 953 | 1,158 | -2.56% | 88 | 11 | CDP |
| Baker | 49 | 508 | 602 | -2.87% | 189 | 3 | CDP |
| Lytle Creek | 50 | 485 | 656 | -2.81% | 81 | 6 | CDP |
| Bluewater | 51 | 166 | 142 | 0% | 159 | 1 | CDP |
San Bernardino is the largest city in San Bernardino County, with a population of 225,439.
Bluewater is the smallest city in San Bernardino County, with a population of 166.
There are 51 cities in San Bernardino County, California.