<SEC-DOCUMENT>0001114927-25-000034-index.html : 20250606
<SEC-HEADER>0001114927-25-000034.hdr.sgml : 20250606
<ACCEPTANCE-DATETIME>20250606163152
ACCESSION NUMBER:		0001114927-25-000034
CONFORMED SUBMISSION TYPE:	8-K
PUBLIC DOCUMENT COUNT:		13
CONFORMED PERIOD OF REPORT:	20250603
ITEM INFORMATION:		Changes in Registrant's Certifying Accountant
FILED AS OF DATE:		20250606
DATE AS OF CHANGE:		20250606

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			FIRST NORTHERN COMMUNITY BANCORP
		CENTRAL INDEX KEY:			0001114927
		STANDARD INDUSTRIAL CLASSIFICATION:	SAVINGS INSTITUTION, FEDERALLY CHARTERED [6035]
		ORGANIZATION NAME:           	02 Finance
		EIN:				680450397
		STATE OF INCORPORATION:			CA
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		8-K
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-30707
		FILM NUMBER:		251031217

	BUSINESS ADDRESS:	
		STREET 1:		195 N FIRST STREET
		CITY:			DIXON
		STATE:			CA
		ZIP:			95620
		BUSINESS PHONE:		7076783041

	MAIL ADDRESS:	
		STREET 1:		195 N FIRST STREET
		CITY:			DIXON
		STATE:			CA
		ZIP:			95620
</SEC-HEADER>
<DOCUMENT>
<TYPE>8-K
<SEQUENCE>1
<FILENAME>form8_k.htm
<DESCRIPTION>FIRST NORTHERN COMMUNITY BANCORP FORM 8-K DATED JUNE 3, 2025
<TEXT>
Document 1 - file: form8_k.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-16.1
<SEQUENCE>2
<FILENAME>exhibit16_1.htm
<DESCRIPTION>MOSS ADAMS LLP LETTER TO SECURITIES AND EXCHANGE COMMISSION DATED JUNE 6, 2025
<TEXT>
Document 2 - file: exhibit16_1.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-101.SCH
<SEQUENCE>3
<FILENAME>fnrn-20250603.xsd
<DESCRIPTION>XBRL TAXONOMY EXTENSION SCHEMA
<TEXT>
Document 3 - file: fnrn-20250603.xsd

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-101.LAB
<SEQUENCE>4
<FILENAME>fnrn-20250603_lab.xml
<DESCRIPTION>XBRL TAXONOMY EXTENSION LABEL LINKBASE
<TEXT>
Document 4 - file: fnrn-20250603_lab.xml

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<DOCUMENT>
<TYPE>EX-101.PRE
<SEQUENCE>5
<FILENAME>fnrn-20250603_pre.xml
<DESCRIPTION>XBRL TAXONOMY EXTENSION PRESENTATION LINKBASE
<TEXT>
Document 5 - file: fnrn-20250603_pre.xml

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<DOCUMENT>
<TYPE>XML
<SEQUENCE>7
<FILENAME>R1.htm
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
Document 7 - file: R1.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>XML
<SEQUENCE>8
<FILENAME>Show.js
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
Document 8 - file: Show.js

</DOCUMENT>
<DOCUMENT>
<TYPE>XML
<SEQUENCE>9
<FILENAME>report.css
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
Document 9 - file: report.css

</DOCUMENT>
<DOCUMENT>
<TYPE>XML
<SEQUENCE>11
<FILENAME>FilingSummary.xml
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
Document 11 - file: FilingSummary.html

Document 11 - RAW XML: FilingSummary.xml

</DOCUMENT>
<DOCUMENT>
<TYPE>JSON
<SEQUENCE>13
<FILENAME>MetaLinks.json
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
Document 13 - file: MetaLinks.json

</DOCUMENT>
<DOCUMENT>
<TYPE>ZIP
<SEQUENCE>14
<FILENAME>0001114927-25-000034-xbrl.zip
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
Document 14 - file: 0001114927-25-000034-xbrl.zip

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<DOCUMENT>
<TYPE>XML
<SEQUENCE>15
<FILENAME>form8_k_htm.xml
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
Document 15 - file: form8_k_htm.html

Document 15 - RAW XML: form8_k_htm.xml

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