<SEC-DOCUMENT>0001140361-21-015316-index.html : 20210430
<SEC-HEADER>0001140361-21-015316.hdr.sgml : 20210430
<ACCEPTANCE-DATETIME>20210430163930
ACCESSION NUMBER:		0001140361-21-015316
CONFORMED SUBMISSION TYPE:	S-3ASR
PUBLIC DOCUMENT COUNT:		10
FILED AS OF DATE:		20210430
DATE AS OF CHANGE:		20210430
EFFECTIVENESS DATE:		20210430

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			NBT BANCORP INC
		CENTRAL INDEX KEY:			0000790359
		STANDARD INDUSTRIAL CLASSIFICATION:	NATIONAL COMMERCIAL BANKS [6021]
		IRS NUMBER:				161268674
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		S-3ASR
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	333-255678
		FILM NUMBER:		21878904

	BUSINESS ADDRESS:	
		STREET 1:		52 S BROAD ST
		CITY:			NORWICH
		STATE:			NY
		ZIP:			13815
		BUSINESS PHONE:		6073372265

	MAIL ADDRESS:	
		STREET 1:		52 S. BROAD STREET
		CITY:			NORWICH
		STATE:			NY
		ZIP:			13815
</SEC-HEADER>
<DOCUMENT>
<TYPE>S-3ASR
<SEQUENCE>1
<FILENAME>nt10023718x1_s3asr.htm
<DESCRIPTION>S-3ASR
<TEXT>
Document 1 - file: nt10023718x1_s3asr.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-5.1
<SEQUENCE>2
<FILENAME>nt10023718x1_ex5-1.htm
<DESCRIPTION>EXHIBIT 5.1
<TEXT>
Document 2 - file: nt10023718x1_ex5-1.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-23.2
<SEQUENCE>3
<FILENAME>nt10023718x1_ex23-2.htm
<DESCRIPTION>EXHIBIT 23.2
<TEXT>
Document 3 - file: nt10023718x1_ex23-2.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-25.2
<SEQUENCE>4
<FILENAME>nt10023718x1_ex25-2.htm
<DESCRIPTION>EXHIBIT 25.2
<TEXT>
Document 4 - file: nt10023718x1_ex25-2.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>5
<FILENAME>img001_v1.jpg
<TEXT>
Document 5 - file: img001_v1.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>6
<FILENAME>img002_v1.jpg
<TEXT>
Document 6 - file: img002_v1.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>7
<FILENAME>img003_v1.jpg
<TEXT>
Document 7 - file: img003_v1.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>8
<FILENAME>img004_v1.jpg
<TEXT>
Document 8 - file: img004_v1.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>9
<FILENAME>img005_v1.jpg
<TEXT>
Document 9 - file: img005_v1.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>10
<FILENAME>logo_nbtbancorp.jpg
<TEXT>
Document 10 - file: logo_nbtbancorp.jpg

</DOCUMENT>
</SEC-DOCUMENT>