<SEC-DOCUMENT>0000897101-21-000335-index.html : 20210430
<SEC-HEADER>0000897101-21-000335.hdr.sgml : 20210430
<ACCEPTANCE-DATETIME>20210430150107
ACCESSION NUMBER:		0000897101-21-000335
CONFORMED SUBMISSION TYPE:	10-K/A
PUBLIC DOCUMENT COUNT:		3
CONFORMED PERIOD OF REPORT:	20201231
FILED AS OF DATE:		20210430
DATE AS OF CHANGE:		20210430

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			COMMUNICATIONS SYSTEMS INC
		CENTRAL INDEX KEY:			0000022701
		STANDARD INDUSTRIAL CLASSIFICATION:	TELEPHONE & TELEGRAPH APPARATUS [3661]
		IRS NUMBER:				410957999
		STATE OF INCORPORATION:			MN
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		10-K/A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-31588
		FILM NUMBER:		21876936

	BUSINESS ADDRESS:	
		STREET 1:		10900 RED CIRCLE DRIVE
		CITY:			MINNETONKA
		STATE:			MN
		ZIP:			55343
		BUSINESS PHONE:		9529961674

	MAIL ADDRESS:	
		STREET 1:		10900 RED CIRCLE DRIVE
		CITY:			MINNETONKA
		STATE:			MN
		ZIP:			55343
</SEC-HEADER>
<DOCUMENT>
<TYPE>10-K/A
<SEQUENCE>1
<FILENAME>csi210629_10k-a.htm
<DESCRIPTION>AMENDMENT NO. 1 TO FORM 10-K
<TEXT>
Document 1 - file: csi210629_10k-a.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-31.1
<SEQUENCE>2
<FILENAME>csi210629_ex31-1.htm
<DESCRIPTION>CERTIFICATION OF THE CHIEF EXECUTIVE OFFICER
<TEXT>
Document 2 - file: csi210629_ex31-1.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-31.2
<SEQUENCE>3
<FILENAME>csi210629_ex31-2.htm
<DESCRIPTION>CERTIFICATION OF CHIEF FINANCIAL OFFICER
<TEXT>
Document 3 - file: csi210629_ex31-2.htm

</DOCUMENT>
</SEC-DOCUMENT>