Headquarted:
Chartered:
Website: http://www.oldsecond.com
 | A sign for the Old Second Bank branch in Aurora, IL. (September, 2006) |
 | A sign for the Old Second Bank branch in Ottawa, IL. (July, 2006) |
 |  | A sign for the Old Second Bank branch in Plano, IL. (January, 2007/September, 2024) |
 | A sign for the Old Second Bank in Joliet, IL. (March, 2010) |
 | A sign for the Old Second Bank branch in Wasco, IL. (June, 2010) |
 | A sign for the Old Second Bank branch in Maple Park, IL. (June, 2010) |
 | A sign for the Old Second Bank branch in Sycamore, IL. (June, 2010) |
 | A sign for the Old Second Bank branch in Frankfort, IL. (July, 2011) |
 | A sign for the Old Second Bank branch in Plano, IL. (January, 2012) |
 | The Old Second National Bank branch in Aurora, IL. (October, 2012) |
 | The Old Second National Bank in Aurora, IL. (February, 2013) |
 | The Old Second National Bank branch in Aurora, IL. (March, 2013) |
 | The Old Second National Bank branch in Yorkville, IL. (July, 2019) |
 | An Old Second National Bank branch in Aurora, IL. (September, 2021) |
 | An Old Second National Bank branch in Bolingbrook, IL. (May, 2022) |
 | An Old Second National Bank branch in Bolingbrook, IL. (May, 2022) |
 |  | An Old Second National Bank branch in Oakbrook Terrace, IL. (June, 2022/January, 2023) |
 | An Old Second National Bank branch in Chicago, IL. (June, 2022) |
 | An Old Second National Bank branch in Romeoville, IL. (June, 2022) |
 | An Old Second National Bank branch in Wheaton, IL. (July, 2022) |
 | An Old Second National Bank branch in Aurora, IL. (April, 2023) |
 | An Old Second National Bank branch in Chicago, IL. (November, 2023) |
 | An Old Second National Bank branch in Lombard, IL. (March, 2024) |
 | An Old Second National Bank branch in St. Charles, IL. (September, 2024) |
 | An Old Second National Bank branch in Elburn, IL. (September, 2024) |
 | An Old Second National Bank branch in Sycamore, IL. (September, 2024) |
 | An Old Second National Bank branch in South Holland, IL. (December, 2024) |