Hills Bancorporation operates as the bank holding company for Hills Bank and Trust Company that provides commercial banking in the state of Iowa. It accepts various deposits, such as demand, savings, and time deposits; and offers products, including real estate loans comprising residential, multi-family, and commercial real estate loans; mortgage and construction loans; commercial and financial loans; agricultural loans; and automobile, installment, and other consumer loans. The company also maintains night and safe deposit facilities; and provides collection, exchange, and other banking services. In addition, it administers estates, personal trusts, and pension plans; offers farm management, investment advisory, and custodial services for individuals, corporations, and nonprofit organizations; and originates mortgages that are sold in the secondary residential real estate market without mortgage servicing rights being retained. The company operates through its main office and its full-service branches in the Iowa counties of Johnson, Linn, and Washington. It serves to individuals, businesses, governmental units, and institutional customers. Hills Bancorporation was founded in 1904 and is headquartered in Hills, Iowa.