Michele L Helmick (Postmaster)
michele.l.helmick@usps.gov
112 W Main St
New Castle, CO 81647
New Castle, CO 81647
The New Castle Post Office is located in the state of Colorado within Garfield County. This location serves 7,104 New Castle residents with a median income of $68,378. It's estimated that approximately 11,339 packages pass through this post office each year.