Northwest Bank Address: 825 S Grand Ave, Spencer, IA 51301 Phone: (712) 262-4100 Banks Other Businesses: Northwest Bank at 101 W 5th St, Spencer, IA 51301 Northwest Bank at 705 Grand Ave, Spencer, IA 51301 Farmers Trust & Savings Bank at 125 W 4th St, Spencer, IA 51301 US Bank at 126 N Grand Ave, Spencer, IA 51301