The State National Bank is a historic building in El Paso, Texas. It was built in 1921 for the State National Bank, El Paso's oldest bank founded four decades earlier.[2] It was built on the site of a former building for the same bank completed in 1881, which was El Paso's "first real building."[3] The 1921 building was designed by Trost & Trost, and its construction cost $165,000.[2] With "the latest technological developments", it cost $250,000.[4] The interior was a single lofty room with roof supported by steel girders that eliminated need for interior columns.[4] The bank moved into the building in January 1922.[2] It was expanded by renting adjacent property 10 years later, which was annexed permanently in 1942. It was further expanded to the south in 1948.[4]