The Mackay Post Office is located in the state of Idaho within Custer County. This location serves 1,097 Mackay residents with a median income of $42,750. It's estimated that approximately 1,751 packages pass through this post office each year.
The Mackay Post Office is located in the state of Idaho within Custer County. This location serves 1,097 Mackay residents with a median income of $42,750. It's estimated that approximately 1,751 packages pass through this post office each year.