12 cities
| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Conroe | 1 | 126,254 | 91,234 | 4.85% | 1,666 | 76 | City |
| Magnolia | 2 | 8,536 | 2,446 | 13.5% | 1,666 | 5 | City |
| Willis | 3 | 7,608 | 6,449 | 2.6% | 1,607 | 5 | City |
| Shenandoah | 4 | 3,996 | 3,525 | 2.02% | 2,045 | 2 | City |
| Montgomery | 5 | 3,285 | 2,010 | 6.93% | 570 | 6 | City |
| Oak Ridge North | 6 | 2,975 | 3,058 | -0.47% | 2,057 | 1 | City |
| Panorama Village | 7 | 2,520 | 2,522 | 0% | 2,342 | 1 | City |
| Splendora | 8 | 2,246 | 1,697 | 4.27% | 739 | 3 | City |
| Pinehurst | 9 | 2,225 | 2,228 | 0% | 1,303 | 2 | City |
| Cut and Shoot | 10 | 1,240 | 1,090 | 2.06% | 458 | 3 | City |
| Stagecoach | 11 | 613 | 583 | 0.82% | 532 | 1 | Town |
| Woodloch | 12 | 176 | 185 | -0.56% | 2,095 | 0 | Town |
Conroe is the largest city in Montgomery County, with a population of 126,254.
Woodloch is the smallest city in Montgomery County, with a population of 176.
There are 12 cities in Montgomery County, Texas.