Texas is also the home to four branches, however, they operate under the name of First National Bank Southwest. On December 15, 2000, FNBO acquired First State Bank in Frisco. The initial branches in Glenwood opened on January 1, 1883, as Mills County State Bank. On May 1, 2001, they changed their name to Mills County Bank, N.A. On February 9, 2008, they merged with First National Bank of Omaha. The first branch in Council Bluffs opened on July 28, 2008. The first First National Bank Iowa branch opened in Des Moines on June 30, 2008.