Sunflower Bank N.A. Banks Sunflower Bank N.A. Visit Website Request Info 615 - 24th St Suite 100 Golden, CO 80401 (303) 279-4450 (303) 279-4459 (fax) Hours: M-F 8-5 About Map About Sunflower Bank is bringing out the best in the lives we touch... Creating Possibility by elevating the community banking experience. What's Nearby? Distance: 5 10 15 20 25 50 mi.