<SEC-DOCUMENT>0000719220-18-000007-index.html : 20180125
<SEC-HEADER>0000719220-18-000007.hdr.sgml : 20180125
<ACCEPTANCE-DATETIME>20180125120101
ACCESSION NUMBER:		0000719220-18-000007
CONFORMED SUBMISSION TYPE:	8-K
PUBLIC DOCUMENT COUNT:		6
CONFORMED PERIOD OF REPORT:	20180122
ITEM INFORMATION:		Results of Operations and Financial Condition
ITEM INFORMATION:		Regulation FD Disclosure
ITEM INFORMATION:		Other Events
ITEM INFORMATION:		Financial Statements and Exhibits
FILED AS OF DATE:		20180125
DATE AS OF CHANGE:		20180125

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			S&T BANCORP INC
		CENTRAL INDEX KEY:			0000719220
		STANDARD INDUSTRIAL CLASSIFICATION:	STATE COMMERCIAL BANKS [6022]
		IRS NUMBER:				251434426
		STATE OF INCORPORATION:			PA
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		8-K
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-12508
		FILM NUMBER:		18547465

	BUSINESS ADDRESS:	
		STREET 1:		800 PHILADELPHIA STREET
		STREET 2:		PO BOX 190
		CITY:			INDIANA
		STATE:			PA
		ZIP:			15701
		BUSINESS PHONE:		724-427-2347

	MAIL ADDRESS:	
		STREET 1:		800 PHILADELPHIA STREET
		STREET 2:		PO BOX 190
		CITY:			INDIANA
		STATE:			PA
		ZIP:			15701
</SEC-HEADER>
<DOCUMENT>
<TYPE>8-K
<SEQUENCE>1
<FILENAME>stba-20171231x8k.htm
<DESCRIPTION>8-K
<TEXT>
Document 1 - file: stba-20171231x8k.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.1
<SEQUENCE>2
<FILENAME>stba-20171231xex991.htm
<DESCRIPTION>EXHIBIT 99.1
<TEXT>
Document 2 - file: stba-20171231xex991.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.2
<SEQUENCE>3
<FILENAME>a2017highlightspressrele.htm
<DESCRIPTION>EXHIBIT 99.2
<TEXT>
Document 3 - file: a2017highlightspressrele.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.3
<SEQUENCE>4
<FILENAME>stba-20171231divxex993.htm
<DESCRIPTION>EXHIBIT 99.3
<TEXT>
Document 4 - file: stba-20171231divxex993.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>5
<FILENAME>a2017highlightspressrele001.jpg
<TEXT>
Document 5 - file: a2017highlightspressrele001.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>6
<FILENAME>secondquarter2016earn_image.jpg
<TEXT>
Document 6 - file: secondquarter2016earn_image.jpg

</DOCUMENT>
</SEC-DOCUMENT>