6 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Mount Ida | 1 | 1,011 | 995 | 0.3% | 644 | 1.57 | City |
| Norman | 2 | 311 | 305 | 0.32% | 276 | 1.13 | Town |
| Oden | 3 | 188 | 180 | 1.08% | 231 | 0.81 | Town |
| Black Springs | 4 | 96 | 91 | 1.05% | 216 | 0.45 | Town |
| Caddo Gap | 5 | 79 | 101 | 6.76% | 198 | 0.40 | CDP |
| Pencil Bluff | 6 | 49 | 157 | 6.52% | 93 | 0.53 | CDP |
Mount Ida is the largest city in Montgomery County, with a population of 1,011.
Pencil Bluff is the smallest city in Montgomery County.
There are 6 cities in Montgomery County, Arkansas.