    <SEC-DOCUMENT>0000719220-17-000031-index.html : 20170515
    <SEC-HEADER>0000719220-17-000031.hdr.sgml : 20170515
    <ACCEPTANCE-DATETIME>20170515091709
    ACCESSION NUMBER:		0000719220-17-000031
    CONFORMED SUBMISSION TYPE:	8-K
    PUBLIC DOCUMENT COUNT:		19
    CONFORMED PERIOD OF REPORT:	20170515
    ITEM INFORMATION:		Regulation FD Disclosure
    ITEM INFORMATION:		Financial Statements and Exhibits
    FILED AS OF DATE:		20170515
    DATE AS OF CHANGE:		20170515

    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:		17841562

    	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>form8-k1q17annualpres.htm
    <DESCRIPTION>8-K
    <TEXT>
    Document 1 - file: form8-k1q17annualpres.htm

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    <DOCUMENT>
    <TYPE>EX-99.1
    <SEQUENCE>2
    <FILENAME>stba1q17annualmtgpres.htm
    <DESCRIPTION>EXHIBIT 99.1
    <TEXT>
    Document 2 - file: stba1q17annualmtgpres.htm

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    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>3
    <FILENAME>stba1q17annualmtgpres001.jpg
    <TEXT>
    Document 3 - file: stba1q17annualmtgpres001.jpg

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    <FILENAME>stba1q17annualmtgpres002.jpg
    <TEXT>
    Document 4 - file: stba1q17annualmtgpres002.jpg

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    Document 6 - file: stba1q17annualmtgpres004.jpg

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    <SEQUENCE>8
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    <SEQUENCE>10
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    Document 10 - file: stba1q17annualmtgpres008.jpg

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    <FILENAME>stba1q17annualmtgpres010.jpg
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    Document 12 - file: stba1q17annualmtgpres010.jpg

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    <SEQUENCE>13
    <FILENAME>stba1q17annualmtgpres011.jpg
    <TEXT>
    Document 13 - file: stba1q17annualmtgpres011.jpg

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    <SEQUENCE>14
    <FILENAME>stba1q17annualmtgpres012.jpg
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    Document 14 - file: stba1q17annualmtgpres012.jpg

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    <SEQUENCE>17
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    Document 17 - file: stba1q17annualmtgpres015.jpg

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    <SEQUENCE>18
    <FILENAME>stba1q17annualmtgpres016.jpg
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    Document 18 - file: stba1q17annualmtgpres016.jpg

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    <SEQUENCE>19
    <FILENAME>stba1q17annualmtgpres017.jpg
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    Document 19 - file: stba1q17annualmtgpres017.jpg

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