EXHIBIT 99.1 Contact: David S. Hickman Telephone: (517) 423-1700 Date: September 22, 2005 FOR IMMEDIATE RELEASE UNITED BANCORP, INC. INCREASES CASH DIVIDEND TECUMSEH - On September 14, 2005, the board of directors of United Bancorp, Inc., parent company of United Bank & Trust and United Bank & Trust - Washtenaw, declared a third quarter cash dividend of 37 cents per share, payable October 28, 2005, to shareholders of record October 11, 2005. This represents an increase of 5.7% from 35 cents per share, which has been in effect since the third quarter of 2004. ###