Seneca, Illinois
Seneca is a village in LaSalle County, Illinois, with an estimated population of 2,311 in 2023. It sits at 41.3026, -88.6147 in the America/Chicago time zone.
| Field | Value |
|---|---|
| Place name | Seneca |
| Type | village |
| State | Illinois (IL) |
| County | LaSalle County |
| Population (2023 est.) | 2,311 |
| Land area | 6.21 sq mi (16.07 km²) |
| Coordinates | 41.3026, -88.6147 |
| Time zone | America/Chicago |
| ZIP codes | 61360 |
This place also extends into Grundy County.
ZIP codes and area codes for Seneca
Seneca covers 1 ZIP code: 61360. Browse all ZIP codes in Illinois for the full list.
Where is Seneca?
Seneca is located in Illinois, in LaSalle County. The coordinates above can be pasted directly into any map service. The nearest indexed places are listed below, which is a useful check when two states share a place name.
Nearby places
Marseilles 6 km · ILRansom 16 km · ILMazon 17 km · ILMorris 18 km · ILOttawa 18 km · ILGrand Ridge 20 km · ILNaplate 22 km · ILLisbon 24 km · IL
Other places in LaSalle County
Ottawa 18,752Streator 12,269Peru 9,780LaSalle 9,432Mendota 6,929Marseilles 4,773Oglesby 3,639Sheridan 2,418Earlville 1,597North Utica 1,332
Related
Frequently asked questions
What county is Seneca, IL in?
Seneca is in LaSalle County, Illinois.
What is the population of Seneca, IL?
The 2023 Census Bureau estimate is 2,311.
What time zone is Seneca in?
Seneca is in the America/Chicago time zone.