| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Conroe | 1 | 125,440 | 91,156 | 4.91% | 1,655 | 76 | City |
| Magnolia | 2 | 9,143 | 3,037 | 12.95% | 1,784 | 5 | City |
| Willis | 3 | 7,844 | 6,423 | 2.51% | 1,657 | 5 | City |
| Shenandoah | 4 | 3,916 | 3,526 | 2.17% | 2,004 | 2 | City |
| Montgomery | 5 | 3,323 | 2,005 | 7.02% | 577 | 6 | City |
| Oak Ridge North | 6 | 2,979 | 3,054 | -0.4% | 2,060 | 1 | City |
| Panorama Village | 7 | 2,524 | 2,524 | 0.08% | 2,346 | 1 | City |
| Splendora | 8 | 2,239 | 1,679 | 4.33% | 737 | 3 | City |
| Pinehurst | 9 | 2,202 | 2,228 | -0.18% | 1,289 | 2 | City |
| Cut and Shoot | 10 | 1,166 | 1,045 | 2.19% | 430 | 3 | City |
| Stagecoach | 11 | 611 | 583 | 0.83% | 530 | 1 | Town |
| Woodloch | 12 | 176 | 184 | -0.56% | 2,095 | 0 | Town |
Conroe is the largest city in Montgomery County, with a population of 125,440.
Woodloch is the smallest city in Montgomery County, with a population of 176.
There are 12 cities in Montgomery County, Texas.