Illinois Grundy County LaSalle County
Seneca
A village in LaSalle County, Illinois — population 2,217 as of 2020.
Home city
My cities
Cities
stops being your city.
Seneca takes over news, events and the map.
Overnight
50°F
Mostly Clear2% precip
Sunday
73°F
Sunny1% precip
Sunday Night
44°F
Mostly Clear
Monday
68°F
Sunny
In and around Seneca
See & do
+7 more on the mapEat, drink & stay
- 3rd Bar
- Anchor Inn Marina and Campground
- The Sandlot & Right Field Pizza
- Anchors Away Bar & Grill
- Boondocks Food & Spirits
Shops & services
+20 more on the mapSeneca changes faster than we can keep up.
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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