Bettendorf (bĕtˈəndocirc;rfˌ) [key], city (1990 pop. 28,132), Scott co., E Iowa, on the Mississippi River; settled c.1840, inc. 1903. Manufactures include transportation equipment, asphalt, pools and spas, and electronic products; there is metal processing. Bettendorf's growth in the late 20th cent. led to its displacing East Moline as one of the Quad Cities; the others are Davenport and Moline and Rock Island, Ill.