arsenal credit union

Arsenal Credit Union (ACU) provides financial products and services to people who live and work in the St. Louis metropolitan area. The credit union is chartered and regulated under the authority of the Missouri Division of Credit Unions. Member deposits are federally insured to at least $250,000 by the National Credit Union Administration (NCUA), a U.S. government agency. The credit union has five branches and is headquartered in Arnold, Missouri. ACU is the 7th-largest credit union in St. Louis and the 9th-largest in Missouri based on asset size ($383.4 million as of year-end 2022).