Cities and Towns in McHenry County, Illinois
Founded in 1836, McHenry County is one of 102 counties in the state of Illinois. Historically, McHenry County was formed from Cook and LaSalle County. The city of Woodstock is the county seat. With FIPS code of 111, McHenry County has a population of 311,122 and area of 603 square miles (1,562 km²).
List of all cities in McHenry County, IL alphabetically
| City/Town | Postal Code | Area Code |
| Alden, IL | 60001 | 815/779 |
| 60033 | 815/779 | |
| Algonquin, IL | 60102 | 847/224 |
| 60156 | 847/224 | |
| Barrington Hills, IL | 60021 | 847/224 |
| 60102 | 847/224 | |
| Bull Valley, IL | 60012 | 815/779 |
| 60050 | 815/779 | |
| 60097 | 815/779 | |
| 60098 | 815/779 | |
| Cary, IL | 60013 | 847/224 |
| Chemung, IL | 60033 | 815/779 |
| Coral, IL | 60152 | 815/779 |
| Crystal Lake, IL | 60012 | 815/779 |
| 60014 | 815/779 | |
| 60039 | 815/779 | |
| Fox River Grove, IL | 60021 | 847/224 |
| Greenwood, IL | 60098 | 815/779 |
| Harvard, IL | 60033 | 815/779 |
| Hebron, IL | 60034 | 815/779 |
| Holiday Hills, IL | 60050 | 815/779 |
| 60051 | 815/779 | |
| Huntley, IL | 60142 | 847/224 |
| Johnsburg, IL | 60050 | 815/779 |
| 60051 | 815/779 | |
| Lake in the Hills, IL | 60102 | 847/224 |
| 60156 | 847/224 | |
| Lakemoor, IL | 60050 | 815/779 |
| 60051 | 815/779 | |
| Lakewood, IL | 60014 | 815/779 |
| Marengo, IL | 60152 | 815/779 |
| McCullom Lake, IL | 60050 | 815/779 |
| McHenry, IL | 60050 | 815/779 |
| 60051 | 815/779 | |
| Oakwood Hills, IL | 60013 | 847/224 |
| Prairie Grove, IL | 60012 | 815/779 |
| 60050 | 815/779 | |
| Richmond, IL | 60071 | 815/779 |
| Ridgefield, IL | 60012 | 815/779 |
| Ringwood, IL | 60072 | 815/779 |
| Solon Mills, IL | 60071 | 815/779 |
| Spring Grove, IL | 60081 | 815/779 |
| Sunnyside, IL | 60050 | 815/779 |
| Trout Valley, IL | 60013 | 847/224 |
| Union, IL | 60180 | 815/779 |
| Village of Lakewood, IL | 60014 | 815/779 |
| Volo, IL | 60051 | 815/779 |
| Wonder Lake, IL | 60097 | 815/779 |
| Woodstock, IL | 60098 | 815/779 |
