The Mars Post Office is located in the state of Pennsylvania within Butler County. This location serves 14,396 Mars residents with a median income of $91,875. It's estimated that approximately 22,978 packages pass through this post office each year.
The Mars Post Office is located in the state of Pennsylvania within Butler County. This location serves 14,396 Mars residents with a median income of $91,875. It's estimated that approximately 22,978 packages pass through this post office each year.