28 ZIP Codes
| Zip Code | City | Population ↓ |
|---|---|---|
| 60085 | Waukegan | 72,341 |
| 60073 | Round Lake | 62,868 |
| 60047 | Lake Zurich | 44,240 |
| 60089 | Buffalo Grove | 42,872 |
| 60060 | Mundelein | 37,344 |
| 60031 | Gurnee | 37,107 |
| 60030 | Grayslake | 35,792 |
| 60046 | Lake Villa | 34,613 |
| 60099 | Zion | 30,881 |
| 60035 | Highland Park | 30,398 |
| 60048 | Libertyville | 29,124 |
| 60015 | Deerfield | 28,096 |
| 60061 | Vernon Hills | 27,974 |
| 60087 | Waukegan | 27,293 |
| 60002 | Antioch | 24,232 |
| 60045 | Lake Forest | 21,074 |
| 60084 | Wauconda | 17,192 |
| 60064 | North Chicago | 14,884 |
| 60088 | Great Lakes | 14,400 |
| 60020 | Fox Lake | 10,970 |
| 60044 | Lake Bluff | 10,312 |
| 60083 | Wadsworth | 9,981 |
| 60041 | Ingleside | 9,024 |
| 60069 | Lincolnshire | 8,502 |
| 60042 | Island Lake | 8,347 |
| 60096 | Winthrop Harbor | 6,527 |
| 60040 | Highwood | 5,301 |
| 60075 | Russell | 129 |
The data shown reflect ZCTAs from the US Census. As of 2025, there are 28 ZCTAs in Lake County, Illinois (US Census).