37 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Crosby | 1 | 1,024 | 1,074 | -0.97% | 726 | 1 | City |
| Noonan | 2 | 133 | 138 | -0.75% | 455 | 0 | City |
| Fillmore | 3 | 95 | 100 | -1.04% | 2 | 41 | Township |
| Blooming Prairie | 4 | 51 | 55 | -1.92% | 1 | 42 | Township |
| Coalfield | 5 | 44 | 48 | -2.22% | 1 | 35 | Township |
| Westby | 6 | 43 | 45 | 0% | 1 | 48 | Township |
| Blooming Valley | 7 | 42 | 43 | 0% | 1 | 36 | Township |
| Hawkeye | 8 | 42 | 43 | 0% | 1 | 35 | Township |
| Noonan | 9 | 38 | 39 | 0% | 1 | 34 | Township |
| Long Creek | 10 | 36 | 37 | 0% | 1 | 43 | Township |
| Border | 11 | 35 | 36 | 0% | 1 | 35 | Township |
| Sioux Trail | 12 | 35 | 36 | 0% | 1 | 36 | Township |
| Daneville | 13 | 34 | 35 | 0% | 1 | 51 | Township |
| Troy | 14 | 34 | 35 | 0% | 1 | 34 | Township |
| Garnet | 15 | 30 | 31 | 0% | 1 | 35 | Township |
| Fortuna | 16 | 29 | 31 | -3.33% | 29 | 1 | City |
| De Witt | 17 | 29 | 30 | 0% | 1 | 41 | Township |
| Gooseneck | 18 | 29 | 31 | -3.33% | 1 | 42 | Township |
| Hayland | 19 | 26 | 27 | 0% | 1 | 35 | Township |
| Mentor | 20 | 26 | 27 | 0% | 1 | 43 | Township |
| Ambrose | 21 | 24 | 25 | 0% | 1 | 42 | Township |
| Burg | 22 | 23 | 24 | 0% | 1 | 36 | Township |
| Frazier | 23 | 23 | 24 | 0% | 1 | 35 | Township |
| Fertile Valley | 24 | 22 | 23 | 0% | 0.00 | 65 | Township |
| Palmer | 25 | 22 | 23 | 0% | 1 | 35 | Township |
| Stoneview | 26 | 21 | 22 | -4.55% | 1 | 35 | Township |
| Frederick | 27 | 20 | 22 | -4.76% | 1 | 36 | Township |
| Upland | 28 | 19 | 21 | -5% | 1 | 35 | Township |
| Elkhorn | 29 | 17 | 19 | -5.56% | 0.00 | 60 | Township |
| Alexandria | 30 | 15 | 17 | -6.25% | 0.00 | 36 | Township |
| Lincoln Valley | 31 | 15 | 17 | -6.25% | 0.00 | 35 | Township |
| Smoky Butte | 32 | 15 | 17 | -6.25% | 0.00 | 35 | Township |
| Ambrose | 33 | 14 | 16 | -6.67% | 14 | 1 | City |
| Twin Butte | 34 | 12 | 12 | 0% | 0.00 | 35 | Township |
| Plumer | 35 | 9 | 9 | 0% | 0.00 | 35 | Township |
| Clinton | 36 | 8 | 8 | 0% | 0.00 | 35 | Township |
| Writing Rock | 37 | 4 | 4 | 0% | 0.00 | 35 | Township |
Crosby is the largest city in Divide County, with a population of 1,024.
Writing Rock is the smallest city in Divide County, with a population of 4.
There are 37 cities in Divide County, North Dakota.