    <SEC-DOCUMENT>0001104659-14-080317-index.html : 20141113
    <SEC-HEADER>0001104659-14-080317.hdr.sgml : 20141113
    <ACCEPTANCE-DATETIME>20141113150045
    ACCESSION NUMBER:		0001104659-14-080317
    CONFORMED SUBMISSION TYPE:	8-K
    PUBLIC DOCUMENT COUNT:		27
    CONFORMED PERIOD OF REPORT:	20141113
    ITEM INFORMATION:		Regulation FD Disclosure
    ITEM INFORMATION:		Financial Statements and Exhibits
    FILED AS OF DATE:		20141113
    DATE AS OF CHANGE:		20141113

    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:		141217993

    	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>a14-23974_18k.htm
    <DESCRIPTION>8-K
    <TEXT>
    Document 1 - file: a14-23974_18k.htm

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    <DOCUMENT>
    <TYPE>EX-99.1
    <SEQUENCE>2
    <FILENAME>a14-23974_1ex99d1.htm
    <DESCRIPTION>EX-99.1
    <TEXT>
    Document 2 - file: a14-23974_1ex99d1.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>3
    <FILENAME>g239741mmi001.gif
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 3 - file: g239741mmi001.gif

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>4
    <FILENAME>g239741mmi002.gif
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 4 - file: g239741mmi002.gif

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>5
    <FILENAME>g239741mmi003.gif
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 5 - file: g239741mmi003.gif

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    <DOCUMENT>
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    <SEQUENCE>6
    <FILENAME>g239741mmi004.gif
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 6 - file: g239741mmi004.gif

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>7
    <FILENAME>g239741mmi005.gif
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 7 - file: g239741mmi005.gif

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>8
    <FILENAME>g239741mmi006.gif
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 8 - file: g239741mmi006.gif

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>9
    <FILENAME>g239741mmi007.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 9 - file: g239741mmi007.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>10
    <FILENAME>g239741mmi008.gif
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 10 - file: g239741mmi008.gif

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>11
    <FILENAME>g239741mmi009.gif
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 11 - file: g239741mmi009.gif

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>12
    <FILENAME>g239741mmi010.gif
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 12 - file: g239741mmi010.gif

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>13
    <FILENAME>g239741mmi011.gif
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 13 - file: g239741mmi011.gif

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>14
    <FILENAME>g239741mmi012.gif
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 14 - file: g239741mmi012.gif

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    <DOCUMENT>
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    <SEQUENCE>15
    <FILENAME>g239741mmi013.gif
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 15 - file: g239741mmi013.gif

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    <DOCUMENT>
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    <SEQUENCE>16
    <FILENAME>g239741mmi014.gif
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 16 - file: g239741mmi014.gif

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    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>17
    <FILENAME>g239741mmi015.gif
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 17 - file: g239741mmi015.gif

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>18
    <FILENAME>g239741mmi016.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 18 - file: g239741mmi016.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>19
    <FILENAME>g239741mmi017.gif
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 19 - file: g239741mmi017.gif

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>20
    <FILENAME>g239741mmi018.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 20 - file: g239741mmi018.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>21
    <FILENAME>g239741mmi019.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 21 - file: g239741mmi019.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>22
    <FILENAME>g239741mmi020.gif
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 22 - file: g239741mmi020.gif

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>23
    <FILENAME>g239741mmi021.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 23 - file: g239741mmi021.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>24
    <FILENAME>g239741mmi022.gif
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 24 - file: g239741mmi022.gif

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>25
    <FILENAME>g239741mmi023.gif
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 25 - file: g239741mmi023.gif

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>26
    <FILENAME>g239741mmi024.gif
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 26 - file: g239741mmi024.gif

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>27
    <FILENAME>g239741mmi025.gif
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 27 - file: g239741mmi025.gif

    </DOCUMENT>
    </SEC-DOCUMENT>