Seneca Flag

Seneca

County:
LaSalle County
County Seat:
No
Area (mi²):
5.957
State:
Illinois

Seneca is a village located in LaSalle County, Illinois. Seneca has a 2026 population of 2,310. Seneca is currently declining at a rate of -0.13% annually and its population has decreased by -1.49% since the most recent census, which recorded a population of 2,345 in 2020.

2.3K
Total Population
388
Density (mi²)
-3 -0.13%
Growth

Nearby Cities

Sources

  1. US Census State Population Estimates - Most recent state estimates from the Census Bureau's Population Estimates Program
  2. US Census County Population Estimates - Most recent county estimates from the Census Bureau's Population Estimates Program
  3. American Community Survey (2009 - 2013)
  4. Census QuickFacts
  5. Historical Populations of States and Counties (1790 - 1990)