22 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 77386 | Spring | 69,549 |
| 77365 | Porter | 43,025 |
| 77304 | Conroe | 42,277 |
| 77354 | Magnolia | 40,501 |
| 77382 | Spring | 40,170 |
| 77301 | Conroe | 36,835 |
| 77381 | Spring | 35,184 |
| 77357 | New Caney | 34,770 |
| 77316 | Montgomery | 31,917 |
| 77355 | Magnolia | 31,727 |
| 77380 | Spring | 31,151 |
| 77356 | Montgomery | 31,069 |
| 77385 | Conroe | 26,889 |
| 77303 | Conroe | 26,324 |
| 77384 | Conroe | 24,148 |
| 77318 | Willis | 19,820 |
| 77302 | Conroe | 19,787 |
| 77306 | Conroe | 17,695 |
| 77378 | Willis | 17,576 |
| 77372 | Splendora | 14,088 |
| 77362 | Pinehurst | 7,474 |
| 77873 | Richards | 1,179 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 22 ZCTAs in Montgomery County, Texas (US Census).