The Union Post Office is located in the state of Illinois within McHenry County. This location serves 1,694 Union residents with a median income of $67,500. It's estimated that approximately 2,704 packages pass through this post office each year.
The Union Post Office is located in the state of Illinois within McHenry County. This location serves 1,694 Union residents with a median income of $67,500. It's estimated that approximately 2,704 packages pass through this post office each year.