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 (Date of earliest event reported): June 30, 2006

Centrue Financial Corporation

(Exact name of Registrant as specified in its charter)

Delaware
(State or other jurisdiction of incorporation)


1-15025		36-3846489
(Commission File Number)		(I.R.S. Employer Identification Number)

310 South Schuyler Avenue, Kankakee, Illinois		60901
(Address of principal executive offices)		(Zip Code)

(815) 937-4440
(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 (see General Instruction A.2 below):

þ 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))

TABLE OF CONTENTS


	Item 8.01. Other Events
	Item 9.01. Financial Statements and Exhibits
SIGNATURES
Press Release

Item 8.01. Other Events

On June 30, 2006, Centrue Financial Corporation and UnionBancorp, Inc. issued a joint press release announcing that they have signed a definitive agreement to join forces in a merger of equals transaction. A copy of the press release is attached hereto as Exhibit 99.1 and is incorporated by reference herein.

Item 9.01. Financial Statements and Exhibits

(d) Exhibits.

99.1 Press Release dated June 30, 2006.

SIGNATURES

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.


	CENTRUE FINANCIAL CORPORATION
Dated: June 30, 2006	By:	/s/ Thomas A. Daiber
		Thomas A. Daiber
		Chief Executive Officer

Table of Contents

Table of Contents

Table of Contents

CENTRUE FINANCIAL CORP 8-K