UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549


FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the
Securities Exchange Act of 1934.

Date of Report: December 09, 2005
(Date of earliest event reported)

UnionBancorp, Inc.
(Exact name of registrant as specified in its charter)
DE
(State or other jurisdiction
of incorporation) 0-28846
(Commission File Number) 36-3145350
(IRS Employer
Identification Number)
321 West Main Street, Ottawa, IL
(Address of principal executive offices)   61350
(Zip Code)
8154312720
(Registrant's telephone number, including area code)
Not Applicable
(Former Name or Former Address, if changed since last report)


Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

o Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)
o Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)
o Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))
o Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Item 5.02. Departure of Directors or Principal Officers; Election of Directors; Appointment of Principal Officers


On December 9, 2005, UnionBancorp, Inc. issued a news release to announce the resignation Rick R. Clary as President & Chief Operating Officer of the Company's subsidiary, UnionBank, and as Vice President & Chief Operating Officer of UnionBancorp, Inc. The release is attached as Exhibit 99.1 hereto and is incorporated herein by reference.

Item 9.01. Financial Statements and Exhibits

(a) Financial statements:
            None
(b) Pro forma financial information:
            None
(c) Exhibits
            99.1       Press Release of UnionBancorp, Inc. dated December 09, 2005


SIGNATURE

      Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.


Dated: December 09, 2005
UNIONBANCORP, INC.

By:  /s/ Scott A. Yeoman                    
     Scott A. Yeoman
     President and Chief Executive Officer


Exhibit Index Exhibit No. Description 99.1 Press Release of UnionBancorp, Inc. dated December 09, 2005