The Helena National Guard Armory is a historic armory building at 511 Miller Street in Helena, Arkansas. It is a single story brick and masonry structure, built in 1936-37 using Works Progress Administration funds to house the Battery G of the 206th Coastal Artillery. The building's main facade as strong Art Deco styling, with its predominantly brick facing topped by concrete courses, and a strong vertical emphasis achieved by two towers and four pilasters on a pointed-arch roofline. The building housed a variety of military companies between its opening and its closure in 1978.