Elgin
- County:
- Kane County
- County Seat:
- No
- Area (mi²):
- 38.143
- State:
- Illinois
Elgin is a city located in Kane County, Illinois. Elgin has a 2026 population of 114,701. Elgin is currently growing at a rate of 0.68% annually and its population has increased by 0.05% since the most recent census, which recorded a population of 114,645 in 2020.