Elsah
- County:
- Jersey County
- County Seat:
- No
- Area (mi²):
- 1.092
- State:
- Illinois
Elsah is a village located in Jersey County, Illinois. Elsah has a 2026 population of 519. Elsah is currently declining at a rate of 0% annually and its population has decreased by -1.14% since the most recent census, which recorded a population of 525 in 2020.