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) September 19, 2005

(Exact Name of Registrant as Specified in its Charter)

Pennsylvania
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(State or Other Jurisdiction of Incorporation)

0-12508
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(Commission File Number)

25-1434426
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(IRS Employer Identification No.)

43 South Ninth Street, Indiana, PA
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(Address of Principal Executive Offices)

15701
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Zip Code

Registrant's telephone number, including area code

(800) 325-2265
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Item 8.01 - Other Events

The Board of Directors of S&T Bancorp, Inc. declared a $0.28 per share cash dividend at its regular meeting held September 19, 2005. The dividend is payable on October 25, 2005 to shareholders of record on September 30, 2005. This dividend represents a 4 percent increase over the same period last year and a 3 percent annualized yield using the September 19, 2005 closing stock price of $38.36.

Item 9.01 - Financial Statements and Exhibits

(c) Exhibits

(99) Press Release

SIGNATURES

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

September 20, 2005

Robert E. Rout
Senior Executive Vice President,
Chief Financial Officer and Secretary