The Rio Post Office is located in the state of Illinois within Knox County. This location serves 648 Rio residents with a median income of $58,194. It's estimated that approximately 1,034 packages pass through this post office each year.
The Rio Post Office is located in the state of Illinois within Knox County. This location serves 648 Rio residents with a median income of $58,194. It's estimated that approximately 1,034 packages pass through this post office each year.