28 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 60085 | Waukegan | 72,763 |
| 60073 | Round Lake | 62,000 |
| 60047 | Lake Zurich | 44,100 |
| 60089 | Buffalo Grove | 42,781 |
| 60031 | Gurnee | 37,208 |
| 60060 | Mundelein | 37,146 |
| 60030 | Grayslake | 35,579 |
| 60046 | Lake Villa | 34,708 |
| 60099 | Zion | 30,485 |
| 60035 | Highland Park | 30,236 |
| 60048 | Libertyville | 28,945 |
| 60061 | Vernon Hills | 27,883 |
| 60015 | Deerfield | 27,720 |
| 60087 | Waukegan | 27,428 |
| 60002 | Antioch | 24,396 |
| 60045 | Lake Forest | 20,957 |
| 60084 | Wauconda | 17,267 |
| 60064 | North Chicago | 15,047 |
| 60088 | Great Lakes | 14,269 |
| 60020 | Fox Lake | 10,846 |
| 60044 | Lake Bluff | 10,289 |
| 60083 | Wadsworth | 9,655 |
| 60041 | Ingleside | 8,920 |
| 60069 | Lincolnshire | 8,728 |
| 60042 | Island Lake | 8,630 |
| 60096 | Winthrop Harbor | 6,626 |
| 60040 | Highwood | 5,243 |
| 60075 | Russell | 43 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 28 ZCTAs in Lake County, Illinois (US Census).