42 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Garrison | 1 | 1,462 | 1,466 | -0.07% | 1,045 | 1.40 | City |
| Washburn | 2 | 1,275 | 1,295 | -0.31% | 757 | 1.69 | City |
| Underwood | 3 | 766 | 786 | -0.52% | 755 | 1.01 | City |
| Wilton | 4 | 710 | 720 | -0.28% | 1,277 | 0.56 | City |
| Turtle Lake | 5 | 535 | 540 | -0.19% | 1,045 | 0.51 | City |
| Max | 6 | 319 | 328 | -0.62% | 409 | 0.78 | City |
| Riverdale | 7 | 224 | 221 | 0.45% | 161 | 1.39 | City |
| St. Mary township | 8 | 205 | 199 | 0.49% | 6 | 33.23 | Township |
| White Shield | 9 | 166 | 208 | -6.21% | 44 | 3.80 | CDP |
| Mercer | 10 | 148 | 90 | 8.82% | 667 | 0.22 | City |
| Snow township | 11 | 140 | 141 | -0.71% | 7 | 21.18 | Township |
| Riverdale township | 12 | 102 | 90 | 0% | 3 | 37.06 | Township |
| Loquemont township | 13 | 98 | 99 | -1.01% | 3 | 35.90 | Township |
| Wise township | 14 | 78 | 77 | 0% | 2 | 33.37 | Township |
| Malcolm township | 15 | 73 | 72 | 0% | 3 | 26.81 | Township |
| Lake Williams township | 16 | 72 | 73 | -1.37% | 2 | 32.40 | Township |
| Coleharbor | 17 | 69 | 59 | 2.99% | 379 | 0.18 | City |
| Victoria township | 18 | 69 | 71 | -1.43% | 2 | 31.16 | Township |
| Butte | 19 | 68 | 68 | 0% | 276 | 0.25 | City |
| Benedict | 20 | 66 | 65 | 0% | 264 | 0.25 | City |
| Washburn township | 21 | 64 | 65 | 0% | 2 | 35.90 | Township |
| Turtle Lake township | 22 | 63 | 57 | 3.28% | 2 | 33.98 | Township |
| Amundsville township | 23 | 58 | 52 | 3.57% | 2 | 35.90 | Township |
| McGinnis township | 24 | 49 | 46 | 2.08% | 1 | 35.41 | Township |
| Dogden township | 25 | 46 | 45 | 0% | 1 | 35.38 | Township |
| Andrews township | 26 | 44 | 43 | 0% | 1 | 35.78 | Township |
| Horseshoe Valley township | 27 | 41 | 40 | 0% | 1 | 35.28 | Township |
| Mercer township | 28 | 40 | 43 | -2.44% | 1 | 35.11 | Township |
| Otis township | 29 | 39 | 35 | 2.63% | 1 | 35.04 | Township |
| Greatstone township | 30 | 38 | 41 | -2.56% | 1 | 36 | Township |
| Longfellow township | 31 | 38 | 38 | 0% | 1 | 36.09 | Township |
| Blackwater township | 32 | 37 | 40 | -2.63% | 1 | 35.34 | Township |
| Medicine Hill township | 33 | 36 | 39 | -2.7% | 1 | 34.31 | Township |
| Cremerville township | 34 | 26 | 26 | 0% | 1 | 35.74 | Township |
| Rosemont township | 35 | 26 | 26 | 0% | 1 | 35.82 | Township |
| Gate township | 36 | 25 | 25 | 0% | 1 | 35.72 | Township |
| Roseglen township | 37 | 24 | 24 | 0% | 1 | 35.67 | Township |
| Deepwater township | 38 | 20 | 20 | 0% | 1 | 36.05 | Township |
| Aurena township | 39 | 17 | 17 | 0% | 0.00 | 35.60 | Township |
| Butte township | 40 | 13 | 13 | 0% | 0.00 | 35.63 | Township |
| Byersville township | 41 | 8 | 8 | 0% | 0.00 | 34.81 | Township |
| Ruso | 42 | 5 | 5 | 0% | 20 | 0.25 | City |
Garrison is the largest city in McLean County, with a population of 1,462.
Ruso is the smallest city in McLean County.
There are 42 cities in McLean County, North Dakota.