Exhibit 23.3
7205 W. Central Avenue
Toledo, Ohio 43617
P 419.841.8521
www.austinassociates.com
CONSENT OF AUSTIN ASSOCIATES, LLC
The Board of Directors
Mainline Bancorp, Inc.
325 Industrial Park Road
Ebensburg, PA 15931
Members of the Board:
We hereby consent to the inclusion of our fairness opinion letter, dated September 13, 2011, to the Board of Directors of Mainline Bancorp, Inc. (“Mainline”) as Annex B hereto, and reference under the headings “Questions and Answers about the Merger,” “Summary,” “Risk Factors” and “Proposal 1—The Merger” in the proxy statement/prospectus on Form S-4 (the “Registration Statement”) relating to the proposed transaction involving Mainline and S&T Bancorp, Inc. In giving such consent, we do not admit that we come within the category of persons whose consent is required under, nor do we admit that we are “experts” with respect to any part of the Registration Statement for purposes of the Securities Act of 1933, as amended, and the rules and regulations promulgated thereunder.
AUSTIN ASSOCIATES, LLC
| By: | /s/ Richard F. Maroney, Jr. | |
| Richard F. Maroney, Jr. | ||
| Managing Director and Principal |
December 9, 2011