The Callao Post Office is located in the state of Missouri within Macon County. This location serves 804 Callao residents with a median income of $45,625. It's estimated that approximately 1,283 packages pass through this post office each year.
The Callao Post Office is located in the state of Missouri within Macon County. This location serves 804 Callao residents with a median income of $45,625. It's estimated that approximately 1,283 packages pass through this post office each year.