Ownership Submission
FORM 3
 UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940
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(Print or Type Responses)
1. Name and Address of Reporting Person *
  Sloan Rodney
 2. Date of Event Requiring Statement (Month/Day/Year)
12/19/2006		 3. Issuer Name and Ticker or Trading Symbol
OLD SECOND BANCORP INC [OSBC]
(Last)
(First)
(Middle)
37 S. RIVER ST.		 4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director _____ 10% Owner
__X__ Officer (give title below) _____ Other (specify below)
Chief Risk Officer
 5. If Amendment, Date Original Filed(Month/Day/Year)
(Street)

AURORA, IL 60506		 6. Individual or Joint/Group Filing(Check Applicable Line)
_X_ Form filed by One Reporting Person
___ Form filed by More than One Reporting Person
(City)
(State)
(Zip)
Table I - Non-Derivative Securities Beneficially Owned
1.Title of Security
(Instr. 4)		 2. Amount of Securities Beneficially Owned
(Instr. 4)		 3. Ownership Form: Direct (D) or Indirect (I)
(Instr. 5)		 4. Nature of Indirect Beneficial Ownership
(Instr. 5)
Old Second Bancorp Inc. Common Stock 2,600 (1)
D
 
Old Second Bancorp Inc. Common Stock 4,712 (2)
I
Profit Sharing Plan

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly. SEC 1473 (7-02)
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Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security
(Instr. 4)		 2. Date Exercisable and Expiration Date
(Month/Day/Year)		 3. Title and Amount of Securities Underlying Derivative Security
(Instr. 4)		 4. Conversion or Exercise Price of Derivative Security 5. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
(Instr. 5)		 6. Nature of Indirect Beneficial Ownership
(Instr. 5)
Date Exercisable Expiration Date Title Amount or Number of Shares
Old Second Bancorp Inc. Stock Option (right to buy) 12/20/2005 12/21/2014 Common Stock 7,000 $ 32.59 D  
Old Second Bancorp Inc. Stock Option (right to buy) 12/20/2005 12/16/2013 Common Stock 7,000 (3) $ 25.08 D  

Reporting Owners

Reporting Owner Name / Address Relationships
Director 10% Owner Officer Other
Sloan Rodney
37 S. RIVER ST.
AURORA, IL 60506		       Chief Risk Officer  

Signatures

/s/ Rodney Sloan 12/19/2006
**Signature of Reporting Person Date

Explanation of Responses:

* If the form is filed by more than one reporting person, see Instruction 5(b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1) Included in this total are 600 shares held in Mr. Sloan's name alone, 1,500 shares of restricted stock issued in name of Rodney Sloan, and 500 shares held jointly with his spouse.
(2) This total is based on information provided by the Plan Trustee of the Old Second Bancorp Inc. Employees Profit Sharing Plan and Trust as of 9-29-06.
(3) Shares restated for a 2 for 1 stock split effected in the form of a stock dividend payable 7-28-04.

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