The Sumner Post Office is located in the state of Maine within Oxford County. This location serves 948 Sumner residents with a median income of $38,906. It's estimated that approximately 1,513 packages pass through this post office each year.
The Sumner Post Office is located in the state of Maine within Oxford County. This location serves 948 Sumner residents with a median income of $38,906. It's estimated that approximately 1,513 packages pass through this post office each year.