Post Offices in Fort Collins, Colorado, United States SearchSearch SearchSearch View: Grid 1View: Grid 2View: Grid 3View: Grid 4View: Grid 5View: List Fort Collins Post Office No Reviews Favorite Fax: (970) 225-4139Phone: (970) 225-4120Retail Hours Fort Collins Old Town Station Post Office No Reviews Favorite Fax: (970) 484-7202Phone: (970) 472-4022Retail Hours