About Us

Sunflower Bank, First National 1870, and Guardian Mortgage have come together to Elevate the Community Banking Experience, demonstrating to our customers and our communities that we know what it means to build long-term relationships founded on sound principles and trust. Our philosophy is simple:  we offer a full range of financial products, intended to create possibility in the lives we touch and the communities we serve. We recognize and value the unique needs of each customer and work to help them achieve their goals through innovative solutions delivered with a tailored approach and locally informed decision-making. 

We are proud of our longevity and the long-term relationships it represents. Sunflower Bank, as we are known in Kansas, Colorado and Missouri, was founded in 1892. In the Southwest our roots date to 1870 and we operate as First National 1870 across New Mexico and Texas.  Additionally, Guardian Mortgage, which was established in 1965, helps people across our footprint and beyond realize their dreams of homeownership.

Today, with $4 billion in assets, we are headquartered in Denver, CO and provide a full range of banking services including personal, small business, commercial, wealth management, credit cards, home loans, and more. To learn more, stop by one of our 60 locations or visit SunflowerBank.com, FirstNational1870.com, or GuardianMortgageOnline.com.