35 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Kalifornsky | 1 | 8,512 | 8,395 | 0.52% | 124 | 68.76 | CDP |
| Kenai | 2 | 7,951 | 7,438 | 1.31% | 273 | 29.14 | City |
| Sterling | 3 | 6,480 | 5,150 | 0.9% | 83 | 77.78 | CDP |
| Homer | 4 | 6,366 | 5,551 | 2.63% | 462 | 13.79 | City |
| Soldotna | 5 | 4,725 | 4,355 | 1.59% | 683 | 6.92 | City |
| Nikiski | 6 | 4,383 | 4,324 | -0.16% | 63 | 69.48 | CDP |
| Ridgeway | 7 | 2,931 | 2,631 | 2.13% | 175 | 16.79 | CDP |
| Seward | 8 | 2,731 | 2,741 | -0.07% | 196 | 13.96 | City |
| Anchor Point | 9 | 2,342 | 2,247 | 1.17% | 26 | 91.65 | CDP |
| Fritz Creek | 10 | 2,221 | 2,034 | 0.86% | 41 | 53.95 | CDP |
| Cohoe | 11 | 1,559 | 1,469 | 0.84% | 22 | 69.92 | CDP |
| Diamond Ridge | 12 | 1,457 | 1,336 | 1.39% | 34 | 42.40 | CDP |
| Salamatof | 13 | 1,241 | 1,025 | 1.39% | 155 | 8.03 | CDP |
| Funny River | 14 | 1,121 | 1,340 | 1.54% | 42 | 26.71 | CDP |
| Bear Creek | 15 | 1,115 | 1,287 | -4.78% | 29 | 38.33 | CDP |
| Ninilchik | 16 | 984 | 898 | 0.61% | 5 | 207.25 | CDP |
| Happy Valley | 17 | 787 | 667 | 1.68% | 9 | 88.20 | CDP |
| Fox River | 18 | 719 | 526 | 0.42% | 6 | 125.39 | CDP |
| Kachemak | 19 | 603 | 573 | 1.01% | 360 | 1.67 | City |
| Clam Gulch | 20 | 305 | 251 | 3.04% | 23 | 13.34 | CDP |
| Tyonek | 21 | 295 | 415 | 3.15% | 4 | 67.93 | CDP |
| Halibut Cove | 22 | 264 | 188 | 7.32% | 32 | 8.32 | CDP |
| Seldovia | 23 | 256 | 235 | 1.59% | 661 | 0.39 | City |
| Seldovia Village | 24 | 220 | 175 | 1.85% | 12 | 18.15 | CDP |
| Kasilof | 25 | 212 | 705 | -9.4% | 20 | 10.43 | CDP |
| Cooper Landing | 26 | 208 | 263 | -2.35% | 3 | 65.75 | CDP |
| Moose Pass | 27 | 194 | 247 | -1.02% | 11 | 17.71 | CDP |
| Nikolaevsk | 28 | 176 | 188 | -4.86% | 5 | 34.84 | CDP |
| Nanwalek | 29 | 151 | 213 | -4.43% | 18 | 8.38 | CDP |
| Port Graham | 30 | 133 | 150 | -2.21% | 21 | 6.39 | CDP |
| Hope | 31 | 118 | 79 | -4.07% | 2 | 51.72 | CDP |
| Primrose | 32 | 105 | 117 | 7.14% | 3 | 34.47 | CDP |
| Crown Point | 33 | 78 | 57 | 8.33% | 22 | 3.57 | CDP |
| Sunrise | 34 | 18 | 39 | 12.5% | 1 | 13.02 | CDP |
| Beluga | 35 | 5 | 5 | 0% | 0.00 | 99.13 | CDP |
Kalifornsky is the largest city in Kenai Peninsula Borough, with a population of 8,512.
Beluga is the smallest city in Kenai Peninsula Borough.
There are 35 cities in Kenai Peninsula Borough, Alaska.