18 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 60014 | Crystal Lake | 48,590 |
| 60098 | Woodstock | 33,130 |
| 60102 | Algonquin | 32,286 |
| 60050 | Mchenry | 31,781 |
| 60142 | Huntley | 29,692 |
| 60156 | Lake In The Hills | 28,800 |
| 60013 | Cary | 26,694 |
| 60051 | Mchenry | 24,621 |
| 60033 | Harvard | 12,999 |
| 60152 | Marengo | 12,417 |
| 60012 | Crystal Lake | 12,368 |
| 60097 | Wonder Lake | 11,983 |
| 60081 | Spring Grove | 9,088 |
| 60021 | Fox River Grove | 4,996 |
| 60071 | Richmond | 3,851 |
| 60034 | Hebron | 2,033 |
| 60180 | Union | 1,831 |
| 60072 | Ringwood | 870 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 18 ZCTAs in McHenry County, Illinois (US Census).