Xenia
- County:
- Clay County
- County Seat:
- No
- Area (mi²):
- 0.493
- State:
- Illinois
Xenia is a village located in Clay County, Illinois. Xenia has a 2026 population of 370. Xenia is currently declining at a rate of -1.6% annually and its population has decreased by -3.65% since the most recent census, which recorded a population of 384 in 2020.