Cass County Courthouse 300 Minnesota Avenue PO Box 3000 Walker, MN 56484 Phone: (218) 547-7200 Fax: (218) 547-1904 Contact by Email Court Administrator: Kayla Littler × Close Notification Window Directions Free public surface lot and free on-street parking. Business Hours: Mon-Fri 8 a.m.-4:30 p.m.