Wonder Lake
- County:
- McHenry County
- County Seat:
- No
- Area (mi²):
- 5.022
- State:
- Illinois
Wonder Lake is a village located in McHenry County, Illinois. Wonder Lake has a 2026 population of 5,296. Wonder Lake is currently growing at a rate of 8.19% annually and its population has increased by 33.4% since the most recent census, which recorded a population of 3,970 in 2020.