22 ZIP Codes
| Zip Code | City | Population ↓ |
|---|---|---|
| 77386 | Spring | 69,980 |
| 77365 | Porter | 46,418 |
| 77354 | Magnolia | 44,900 |
| 77304 | Conroe | 44,225 |
| 77382 | Spring | 38,986 |
| 77301 | Conroe | 37,769 |
| 77357 | New Caney | 37,592 |
| 77381 | Spring | 36,139 |
| 77316 | Montgomery | 34,694 |
| 77355 | Magnolia | 32,847 |
| 77356 | Montgomery | 32,583 |
| 77380 | Spring | 31,369 |
| 77303 | Conroe | 28,854 |
| 77385 | Conroe | 28,156 |
| 77384 | Conroe | 26,781 |
| 77302 | Conroe | 21,546 |
| 77318 | Willis | 20,792 |
| 77306 | Conroe | 18,086 |
| 77378 | Willis | 17,629 |
| 77372 | Splendora | 14,367 |
| 77362 | Pinehurst | 8,017 |
| 77873 | Richards | 1,383 |
The data shown reflect ZCTAs from the US Census. As of 2025, there are 22 ZCTAs in Montgomery County, Texas (US Census).