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Seneca Post Office in Seneca, IL

Find Seneca Post Office in Seneca, IL 61360 to get information on mail-related services, postal services, postal items and payment, parcel shipment, and mail and parcel delivery.

  • Seneca Post Office
  • 121 Armour Street, Seneca, IL 61360
  • 815-357-8393
  • Mon-Fri 7:30 AM-5:00 PM
    Sat 7:30 AM-12:00 PM

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