<SEC-DOCUMENT>0001047469-18-000833-index.html : 20180215
<SEC-HEADER>0001047469-18-000833.hdr.sgml : 20180215
<ACCEPTANCE-DATETIME>20180215170437
ACCESSION NUMBER:		0001047469-18-000833
CONFORMED SUBMISSION TYPE:	424B5
PUBLIC DOCUMENT COUNT:		3
FILED AS OF DATE:		20180215
DATE AS OF CHANGE:		20180215

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			ION GEOPHYSICAL CORP
		CENTRAL INDEX KEY:			0000866609
		STANDARD INDUSTRIAL CLASSIFICATION:	OIL AND GAS FIELD EXPLORATION SERVICES [1382]
		IRS NUMBER:				222286646
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		424B5
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	333-213769
		FILM NUMBER:		18618498

	BUSINESS ADDRESS:	
		STREET 1:		2105 CITYWEST BLVD
		STREET 2:		SUITE 100
		CITY:			HOUSTON
		STATE:			TX
		ZIP:			770422855
		BUSINESS PHONE:		281.933.3339

	MAIL ADDRESS:	
		STREET 1:		2105 CITYWEST BLVD
		STREET 2:		SUITE 100
		CITY:			HOUSTON
		STATE:			TX
		ZIP:			770422855

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	INPUT OUTPUT INC
		DATE OF NAME CHANGE:	19930328
</SEC-HEADER>
<DOCUMENT>
<TYPE>424B5
<SEQUENCE>1
<FILENAME>a2234551z424b5.htm
<DESCRIPTION>424B5
<TEXT>
Document 1 - file: a2234551z424b5.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>2
<FILENAME>g63000.jpg
<DESCRIPTION>G63000.JPG
<TEXT>
Document 2 - file: g63000.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>3
<FILENAME>g812408.jpg
<DESCRIPTION>G812408.JPG
<TEXT>
Document 3 - file: g812408.jpg

</DOCUMENT>
</SEC-DOCUMENT>