Big Rock
- County:
- Kane County
- County Seat:
- No
- Area (mi²):
- 4.318
- State:
- Illinois
Big Rock is a village located in Kane County, Illinois. Big Rock has a 2026 population of 1,086. Big Rock is currently declining at a rate of -0.18% annually and its population has decreased by -1.63% since the most recent census, which recorded a population of 1,104 in 2020.