<SEC-DOCUMENT>0001145549-22-001518-index.html : 20220113
<SEC-HEADER>0001145549-22-001518.hdr.sgml : 20220113
<ACCEPTANCE-DATETIME>20220113135648
ACCESSION NUMBER:		0001145549-22-001518
CONFORMED SUBMISSION TYPE:	N-CEN
PUBLIC DOCUMENT COUNT:		6
CONFORMED PERIOD OF REPORT:	20211031
FILED AS OF DATE:		20220113
DATE AS OF CHANGE:		20220113
EFFECTIVENESS DATE:		20220113

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			CALAMOS CONVERTIBLE OPPORTUNITIES & INCOME FUND
		CENTRAL INDEX KEY:			0001171471
		IRS NUMBER:				030426532
		FISCAL YEAR END:			1031

	FILING VALUES:
		FORM TYPE:		N-CEN
		SEC ACT:		1940 Act
		SEC FILE NUMBER:	811-21080
		FILM NUMBER:		22528666

	BUSINESS ADDRESS:	
		STREET 1:		2020 CALAMOS COURT
		STREET 2:		C/O CALAMOS ADVISORS LLC
		CITY:			NAPERVILLE
		STATE:			IL
		ZIP:			60653
		BUSINESS PHONE:		6302451046

	MAIL ADDRESS:	
		STREET 1:		2020 CALAMOS COURT
		STREET 2:		C/O CALAMOS ADVISORS LLC
		CITY:			NAPERVILLE
		STATE:			IL
		ZIP:			60653
</SEC-HEADER>
<DOCUMENT>
<TYPE>N-CEN
<SEQUENCE>1
<FILENAME>primary_doc.xml
<TEXT>
Document 1 - file: primary_doc.html

Document 1 - RAW XML: primary_doc.xml

</DOCUMENT>
<DOCUMENT>
<TYPE>INTERNAL CONTROL RPT
<SEQUENCE>2
<FILENAME>ccoalif_internalctrll103121.htm
<DESCRIPTION>CALAMOS CONVERTIBLE OPPORTUNITIES AND INCOME FUND INTERNAL CONTROL 10.31.21
<TEXT>
Document 2 - file: ccoalif_internalctrll103121.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>MATERIAL AMENDMENTS
<SEQUENCE>3
<FILENAME>chi_bylawsmrpsissuaug2321.htm
<DESCRIPTION>CHI BY LAWS MRPS ISSUANCE AUG 23 2021
<TEXT>
Document 3 - file: chi_bylawsmrpsissuaug2321.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>INST DEFINING RIGHTS
<SEQUENCE>4
<FILENAME>chi_g1bii.htm
<DESCRIPTION>CHI G 1 B II
<TEXT>
Document 4 - file: chi_g1bii.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>ITEM 405 REG S-K
<SEQUENCE>5
<FILENAME>chi_g1biv.htm
<DESCRIPTION>CHI G 1 B IV
<TEXT>
Document 5 - file: chi_g1biv.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>MATERIAL AMENDMENTS
<SEQUENCE>6
<FILENAME>chi_dot82321.htm
<DESCRIPTION>CHI DECLARATION OF TRUST 082321
<TEXT>
Document 6 - file: chi_dot82321.htm

</DOCUMENT>
</SEC-DOCUMENT>