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Linda Oliver (Postmaster)
linda.s.oliver@usps.gov
8655 State Route 146 E
Grantsburg, IL 62943
Grantsburg, IL 62943
The Grantsburg Post Office is located in the state of Illinois within Johnson County. This location serves 715 Grantsburg residents with a median income of $37,778. It's estimated that approximately 1,141 packages pass through this post office each year.