<SEC-DOCUMENT>0000357173-15-000006-index.html : 20150121
<SEC-HEADER>0000357173-15-000006.hdr.sgml : 20150121
<ACCEPTANCE-DATETIME>20150121160712
ACCESSION NUMBER:		0000357173-15-000006
CONFORMED SUBMISSION TYPE:	8-K
PUBLIC DOCUMENT COUNT:		2
CONFORMED PERIOD OF REPORT:	20150121
ITEM INFORMATION:		Results of Operations and Financial Condition
ITEM INFORMATION:		Financial Statements and Exhibits
FILED AS OF DATE:		20150121
DATE AS OF CHANGE:		20150121

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			OLD SECOND BANCORP INC
		CENTRAL INDEX KEY:			0000357173
		STANDARD INDUSTRIAL CLASSIFICATION:	STATE COMMERCIAL BANKS [6022]
		IRS NUMBER:				363143493
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		8-K
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-10537
		FILM NUMBER:		15538706

	BUSINESS ADDRESS:	
		STREET 1:		37 S RIVER ST
		CITY:			AURORA
		STATE:			IL
		ZIP:			60507
		BUSINESS PHONE:		7088920202

	MAIL ADDRESS:	
		STREET 1:		37 SOUTH RIVER STREET
		CITY:			AURORA
		STATE:			IL
		ZIP:			60507
</SEC-HEADER>
<DOCUMENT>
<TYPE>8-K
<SEQUENCE>1
<FILENAME>osbc-20150121x8k.htm
<DESCRIPTION>8-K
<TEXT>
Document 1 - file: osbc-20150121x8k.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.1
<SEQUENCE>2
<FILENAME>osbc-20150121ex991a0d227.htm
<DESCRIPTION>EX-99.1
<TEXT>
Document 2 - file: osbc-20150121ex991a0d227.htm

</DOCUMENT>
</SEC-DOCUMENT>