First Interstate Bank Address: 300 SW Wyoming Blvd, Mills, WY 82644 Phone: (307) 235-4448 Banks Other Businesses: Hayden's Place at 5038 W Lafayette St, Mills, WY 82604 Daylight Donuts at 4693 W Yellowstone Hwy, Mills, WY 82604 G-Ma's Diner at 4755 W Yellowstone Hwy, Mills, WY 82604 Fast-N-Famous at 4721 W Yellowstone Hwy, Mills, WY 82604