Hills Bank Online Banking First founded in 1904 in Iowa as Hills Savings Bank, Hills Bank is now one of the largest banks out there. Since 1984, Hills Bank has been owned by the holding company Hills Bancorporation. Customer Service Telephone 1 (800) 445-5725 Online Banking Login How to Log In: 1. Go to www.hillsbank.com. 2. At the log in area, enter your log in ID and password. Click Sign In. You can also use Hills Bank services using your…