Elba township
- County:
- Knox County
- County Seat:
- No
- Area (mi²):
- 36.34
- State:
- Illinois
Elba township is located in Knox County, Illinois. Elba township has a 2026 population of 250. Elba township is currently declining at a rate of -0.79% annually and its population has decreased by -2.72% since the most recent census, which recorded a population of 257 in 2020.
The median household income in Elba township is $105,938 with a poverty rate of 0%. The median age in Elba township is 49.7 years: 64.2 years for males, and 45.2 years for females. For every 100 females there are 79.2 males.