16 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| The Woodlands | 1 | 124,541 | 114,532 | 1.67% | 2,878 | 43 | CDP |
| Conroe | 2 | 119,576 | 91,255 | 4.97% | 1,578 | 76 | City |
| Willis | 3 | 7,308 | 6,447 | 2.41% | 1,544 | 5 | City |
| Magnolia | 4 | 7,232 | 2,451 | 15.23% | 1,493 | 5 | City |
| Shenandoah | 5 | 3,997 | 3,522 | 2.43% | 2,046 | 2 | City |
| Pinehurst | 6 | 3,980 | 5,030 | -1.07% | 503 | 8 | CDP |
| Montgomery | 7 | 3,274 | 2,011 | 8.37% | 650 | 5 | City |
| Oak Ridge North | 8 | 2,915 | 3,047 | -0.88% | 2,016 | 1 | City |
| Panorama Village | 9 | 2,497 | 2,522 | -0.2% | 2,321 | 1 | City |
| Pinehurst | 10 | 2,228 | 2,222 | 0.04% | 1,304 | 2 | City |
| Splendora | 11 | 2,133 | 1,695 | 4.3% | 702 | 3 | City |
| Deerwood | 12 | 2,061 | 1,485 | 7.12% | 3,616 | 1 | CDP |
| Cut Shoot | 13 | 1,246 | 1,090 | 2.55% | 460 | 3 | City |
| Grangerland | 14 | 849 | 675 | 7.2% | 502 | 2 | CDP |
| Stagecoach | 15 | 594 | 584 | 0.34% | 516 | 1 | Town |
| Woodloch | 16 | 173 | 185 | -1.14% | 2,060 | 0 | Town |
The Woodlands is the largest city in Montgomery County, with a population of 124,541.
Woodloch is the smallest city in Montgomery County, with a population of 173.
There are 16 cities in Montgomery County, Texas.