22 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 77386 | Spring | 66,816 |
| 77382 | Spring | 41,085 |
| 77304 | Conroe | 40,317 |
| 77354 | Magnolia | 40,094 |
| 77365 | Porter | 39,385 |
| 77381 | Spring | 36,414 |
| 77301 | Conroe | 34,299 |
| 77355 | Magnolia | 31,593 |
| 77357 | New Caney | 30,907 |
| 77316 | Montgomery | 30,577 |
| 77380 | Spring | 30,034 |
| 77356 | Montgomery | 29,515 |
| 77385 | Conroe | 26,497 |
| 77303 | Conroe | 24,106 |
| 77384 | Conroe | 22,958 |
| 77318 | Willis | 19,127 |
| 77302 | Conroe | 19,076 |
| 77378 | Willis | 18,112 |
| 77306 | Conroe | 16,443 |
| 77372 | Splendora | 13,364 |
| 77362 | Pinehurst | 6,626 |
| 77873 | Richards | 1,287 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 22 ZCTAs in Montgomery County, Texas (US Census).