The Carbon Post Office is located in the state of Indiana within Clay County. This location serves 1,231 Carbon residents with a median income of $55,913. It's estimated that approximately 1,965 packages pass through this post office each year.
The Carbon Post Office is located in the state of Indiana within Clay County. This location serves 1,231 Carbon residents with a median income of $55,913. It's estimated that approximately 1,965 packages pass through this post office each year.