Old Second Bancorp, Inc. is a bank holding company that operates through its subsidiary, Old Second National Bank. The bank provides a range of banking services, including demand, savings, money market, and time deposit accounts; commercial, industrial, consumer, and real estate lending; safe deposit operations; trust services; and an extensive range of online and mobile banking services. Old Second Bancorp, Inc. was founded in 1982 and is headquartered in Aurora, Illinois.