The History of Security National Bank Security National Bank, with over $600 million in assets, is located in Sioux City, Iowa. Since being founded in 1884, every bank president believed that the strength of the bank was in their courteous, service-oriented employees. There have been many changes at Security National over the past years, but one thing has remained constant…our hometown personal service. Security National Bank is the largest home-owned bank in Western Iowa. Security National Corporation, a multi-bank holding company, owns Security National Bank, along with the following banks: Northwestern State Bank in Orange City joined the Corporation in 1972. Located in the “Dutch” country of northwestern Iowa – Northwestern State Bank serves its community and surrounding rural area. In 2006, Northwestern State Bank merged with Security State Bank of Sheldon (joined the Corporation in 1996) to form Northwestern Bank. First State Bank of Mapleton has seen many changes since becoming a part of the of the Corporation in 1981. First State Bank promotes good banking service along with stability, growth and a high quality of life within its rural community. First National Bank of Akron also joined the Corporation in 1981. First National Bank provides financial services for the Akron and Westfield communities, as well as a large rural area in South Dakota. Security National Bank of South Dakota joined the Corporation in 1997. This office located in Dakota Dunes, South Dakota offers a private banking atmosphere and heavily emphasizes its Investment Management and Trust Services. In 2006, Security National Bank of South Dakota will open its first office in Sioux Falls at 74th and Louise Streets. A second office located at 26th and Lorraine streets will open in early 2007.