About Us


Who We Are

Great Western Bank (NYSE:GWB) is a relationship-focused Commercial bank with Agribusiness expertise, partnering with Retail and leveraging our business partners.

Headquartered in Sioux Falls, South Dakota, our banking model seeks to balance the best of being a “big enough & small enough” bank, providing capabilities typical of a much larger bank, with a customer-focused culture usually associated with smaller banks.

We rank as the 5th largest US farm lender (as of December 31, 2019) with more than 170 banking branches across nine states.



Customer and teller in our Overland Park, KS branch


Make Life Great by empowering our employees, strengthening our customers and enriching our communities.


Service, Accountability, Trustworthiness, Commitment, Teamwork

Historical photo of the original Great Western Bank location


1935 - Farmers & Merchants Bank is chartered in Watertown, SD
2003 - Name changed to Great Western Bank
2006 - Acquired Security Bank (SD)
2006 - Moved headquarters from Watertown to Sioux Falls
2007 - Acquired Sunstate Bank (Arizona)
2008 - Purchased by National Australia Bank 
2009 - Acquired 21 offices from First Community Bank and Wachovia (Colorado)
2010 - Acquired 72 branches of F&M Bank and TierOne (Iowa, Nebraska)
2012 - Acquired First Federal Savings Bank of Iowa
2014 - GWB shares begin trading on NYSE
2015 - GWB is 100% public traded
2016 - Acquired Home Federal Bank and Infinia Bank in South Dakota, Minnesota, and North Dakota