![]() | Seneca, IL 61360 Post Office Location: 121 East Armour Street; Seneca, IL Year Post Office built: Town(s) Served: Seneca Acceptable City Names: Seneca Not Acceptable City Names: Stravanger Sectional Service Facility: La Salle County(ies): Grundy, La Salle Info on Seneca: The Village of Seneca is a Illinois River town in Southeastern La Salle County. It is along U.S. 6, Illinois 170, Illinois River, I&M Canal, the CSX Railroad, and Iowa Interstate Railroad. Interstate 80, runs north of the village with a exit about 7 miles from town. |
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