
McHenry
- County:
- Lake County
- County Seat:
- No
- Area (mi²):
- 14.829
- State:
- Illinois
McHenry is a city located in Lake County, Illinois. McHenry has a 2025 population of 28,858. McHenry is currently growing at a rate of 1.06% annually and its population has increased by 5.55% since the most recent census, which recorded a population of 27,340 in 2020.
The average household income in McHenry is $111,072 with a poverty rate of 4.03%. The median age in McHenry is 43.5 years: 39.6 years for males, and 47.8 years for females.