<SEC-DOCUMENT>0000719220-21-000075-index.html : 20210624
<SEC-HEADER>0000719220-21-000075.hdr.sgml : 20210624
<ACCEPTANCE-DATETIME>20210624172928
ACCESSION NUMBER:		0000719220-21-000075
CONFORMED SUBMISSION TYPE:	11-K
PUBLIC DOCUMENT COUNT:		2
CONFORMED PERIOD OF REPORT:	20201231
FILED AS OF DATE:		20210624
DATE AS OF CHANGE:		20210624

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:		11-K
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-12508
		FILM NUMBER:		211043858

	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>11-K
<SEQUENCE>1
<FILENAME>stba2021form11-k.htm
<DESCRIPTION>11-K
<TEXT>
Document 1 - file: stba2021form11-k.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-23.1
<SEQUENCE>2
<FILENAME>a2021_form11-kconsent.htm
<DESCRIPTION>EX-23.1
<TEXT>
Document 2 - file: a2021_form11-kconsent.htm

</DOCUMENT>
</SEC-DOCUMENT>