Exhibit 22.1

LIST OF SUBSIDIARIES

Subsidiaries of the Company	Incorporated Under Laws of	Percent Owned by the Company
Old Second Bank	United States	100%
Old Second Bank - Yorkville	State of Illinois	100%
Old Second Bank - Kane County	State of Illinois	100%
Old Second Financial, Inc.	State of Illinois	100%
Old Second Mortgage, Inc.	State of Illinois	Owned by Old Second Bank
Old Second Capital Trust I	State of Delaware	100% of the common stock
Old Second Affordable Housing Fund, L.L.C.	State of Illinois	70% Owned by Old Second Bank
		15% Owned by Old Second Yorkville Bank
		15% Owned by Old Second Kane County Bank

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