28 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 60085 | Waukegan | 71,465 |
| 60073 | Round Lake | 62,071 |
| 60047 | Lake Zurich | 43,750 |
| 60089 | Buffalo Grove | 42,867 |
| 60031 | Gurnee | 37,202 |
| 60060 | Mundelein | 37,131 |
| 60030 | Grayslake | 35,978 |
| 60046 | Lake Villa | 34,854 |
| 60099 | Zion | 31,523 |
| 60035 | Highland Park | 30,215 |
| 60048 | Libertyville | 29,452 |
| 60015 | Deerfield | 27,835 |
| 60087 | Waukegan | 27,815 |
| 60061 | Vernon Hills | 27,602 |
| 60002 | Antioch | 24,398 |
| 60045 | Lake Forest | 21,159 |
| 60084 | Wauconda | 17,301 |
| 60064 | North Chicago | 15,380 |
| 60088 | Great Lakes | 14,143 |
| 60020 | Fox Lake | 11,051 |
| 60044 | Lake Bluff | 10,271 |
| 60083 | Wadsworth | 9,699 |
| 60041 | Ingleside | 8,843 |
| 60069 | Lincolnshire | 8,602 |
| 60042 | Island Lake | 8,589 |
| 60096 | Winthrop Harbor | 6,655 |
| 60040 | Highwood | 5,227 |
| 60075 | Russell | 0 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 28 ZCTAs in Lake County, Illinois (US Census).