<SEC-DOCUMENT>0001047469-16-017180-index.html : 20161213
<SEC-HEADER>0001047469-16-017180.hdr.sgml : 20161213
<ACCEPTANCE-DATETIME>20161213172845
ACCESSION NUMBER:		0001047469-16-017180
CONFORMED SUBMISSION TYPE:	424B5
PUBLIC DOCUMENT COUNT:		2
FILED AS OF DATE:		20161213
DATE AS OF CHANGE:		20161213

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:			1215

	FILING VALUES:
		FORM TYPE:		424B5
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	333-214459
		FILM NUMBER:		162049774

	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>424B5
<SEQUENCE>1
<FILENAME>a2230450z424b5.htm
<DESCRIPTION>424B5
<TEXT>
Document 1 - file: a2230450z424b5.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>2
<FILENAME>g502868.jpg
<DESCRIPTION>G502868.JPG
<TEXT>
Document 2 - file: g502868.jpg

</DOCUMENT>
</SEC-DOCUMENT>