Cities and Towns in Lake County, Illinois
Founded in 1839, Lake County is one of 102 counties in the state of Illinois. Historically, Lake County was formed from McHenry County. The city of Waukegan is the county seat. With FIPS code of 97, Lake County has a population of 711,239 and area of 443 square miles (1,147 km²).
List of all cities in Lake County, IL alphabetically
| City/Town | Postal Code | Area Code |
| Abbott Park, IL | 60064 | 847/224 |
| Antioch, IL | 60002 | 847/224 |
| Bannockburn, IL | 60015 | 847/224 |
| Barrington, IL | 60010 | 847/224 |
| 60011 | 847/224 | |
| Barrington Hills, IL | 60010 | 847/224 |
| Beach Park, IL | 60083 | 847/224 |
| 60087 | 847/224 | |
| 60099 | 847/224 | |
| Buffalo Grove, IL | 60089 | 847/224 |
| Chesney Shores, IL | 60046 | 847/224 |
| Deer Park, IL | 60010 | 847/224 |
| Deerfield, IL | 60015 | 847/224 |
| Downey, IL | 60064 | 847/224 |
| Echo Lake, IL | 60047 | 847/224 |
| Forest Lake, IL | 60047 | 847/224 |
| Fort Sheridan, IL | 60037 | 847/224 |
| Fox Lake, IL | 60020 | 847/224 |
| Fox Lake Hills, IL | 60046 | 847/224 |
| Fox River Valley Gardens, IL | 60010 | 847/224 |
| Gages Lake, IL | 60030 | 847/224 |
| Grayslake, IL | 60030 | 847/224 |
| Great Lakes, IL | 60088 | 847/224 |
| Green Oaks, IL | 60044 | 847/224 |
| 60045 | 847/224 | |
| 60048 | 847/224 | |
| Gurnee, IL | 60031 | 847/224 |
| Hainesville, IL | 60030 | 847/224 |
| Hainesville, IL | 60073 | 847/224 |
| Half Day, IL | 60069 | 847/224 |
| Hawthorn Woods, IL | 60047 | 847/224 |
| Highland Park, IL | 60035 | 847/224 |
| 60037 | 847/224 | |
| Highwood, IL | 60040 | 847/224 |
| Hoffman Estates, IL | 60010 | 847/224 |
| Indian Creek, IL | 60061 | 847/224 |
| Ingleside, IL | 60041 | 847/224 |
| Inverness, IL | 60010 | 847/224 |
| Island Lake, IL | 60042 | 847/224 |
| Kemper Ins Co, IL | 60049 | 847/224 |
| Kildeer, IL | 60010 | 847/224 |
| 60047 | 847/224 | |
| Knollwood, IL | 60044 | 847/224 |
| Lake Barrington, IL | 60010 | 847/224 |
| 60084 | 847/224 | |
| Lake Barrington Shores, IL | 60010 | 847/224 |
| Lake Bluff, IL | 60044 | 847/224 |
| Lake Forest, IL | 60045 | 847/224 |
| Lake Villa, IL | 60046 | 847/224 |
| Lake Zurich, IL | 60047 | 847/224 |
| 60049 | 847/224 | |
| Libertyville, IL | 60048 | 847/224 |
| 60092 | 847/224 | |
| Lincolnshire, IL | 60069 | 847/224 |
| Lincolnshire Woods, IL | 60045 | 847/224 |
| Lindenhurst, IL | 60046 | 847/224 |
| Long Grove, IL | 60047 | 847/224 |
| 60049 | 847/224 | |
| 60060 | 847/224 | |
| Long Lake, IL | 60041 | 847/224 |
| Mettawa, IL | 60045 | 847/224 |
| 60048 | 847/224 | |
| Mundelein, IL | 60060 | 847/224 |
| North Barrington, IL | 60010 | 847/224 |
| North Chicago, IL | 60064 | 847/224 |
| 60086 | 847/224 | |
| 60088 | 847/224 | |
| Old Mill Creek, IL | 60002 | 847/224 |
| 60083 | 847/224 | |
| Park City, IL | 60085 | 847/224 |
| Point Barrington, IL | 60010 | 847/224 |
| Port Barrington, IL | 60010 | 847/224 |
| Prairie View, IL | 60069 | 847/224 |
| Prairieview, IL | 60069 | 847/224 |
| Riverwoods, IL | 60015 | 847/224 |
| Round Lake, IL | 60073 | 847/224 |
| Round Lake Beach, IL | 60073 | 847/224 |
| Round Lake Heights, IL | 60073 | 847/224 |
| Round Lake Park, IL | 60073 | 847/224 |
| Russell, IL | 60075 | 847/224 |
| Selective Service, IL | 60086 | 847/224 |
| South Barrington, IL | 60010 | 847/224 |
| Stanton Point, IL | 60041 | 847/224 |
| Third Lake, IL | 60030 | 847/224 |
| Timber Lake, IL | 60010 | 847/224 |
| Tower Lakes, IL | 60010 | 847/224 |
| Venetian Village, IL | 60046 | 847/224 |
| Vernon Hills, IL | 60061 | 847/224 |
| Volo, IL | 60020 | 847/224 |
| 60030 | 847/224 | |
| 60041 | 847/224 | |
| 60073 | 847/224 | |
| Wadsworth, IL | 60002 | 847/224 |
| 60083 | 847/224 | |
| Wauconda, IL | 60084 | 847/224 |
| Waukegan, IL | 60079 | 847/224 |
| 60085 | 847/224 | |
| 60087 | 847/224 | |
| West Miltmore, IL | 60046 | 847/224 |
| Wildwood, IL | 60030 | 847/224 |
| Winthrop Harbor, IL | 60096 | 847/224 |
| Zion, IL | 60099 | 847/224 |
