Illinois Grundy County LaSalle County
Seneca
A village in Grundy County, Illinois — population 2,217 as of 2020.
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This Afternoon
79°F
Sunny12% precip
Tonight
58°F
Mostly Clear10% precip
Sunday
77°F
Sunny
Sunday Night
56°F
Mostly Clear
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Seneca by the numbers
Population
2,217Population figure, 2020
Households & income
- Area
- 6.21 sq mi (16.08 km²), 0.37 sq mi water
- Median age
- 35.5
- Households
- 907
- Persons per household
- 2.7
- Median household income
- $86,830
- Median house value
- $227,500
Municipal office
- Office
- VILLAGE TREAS
- Address
- 340 N. CASH, SENECA, IL 61360