<SEC-DOCUMENT>0001127602-19-002806-index.html : 20190128
<SEC-HEADER>0001127602-19-002806.hdr.sgml : 20190128
<ACCEPTANCE-DATETIME>20190128135703
ACCESSION NUMBER:		0001127602-19-002806
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20190124
FILED AS OF DATE:		20190128
DATE AS OF CHANGE:		20190128

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			THORSON JOHN A
		CENTRAL INDEX KEY:			0001201516

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-09383
		FILM NUMBER:		19544795

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			WESTAMERICA BANCORPORATION
		CENTRAL INDEX KEY:			0000311094
		STANDARD INDUSTRIAL CLASSIFICATION:	NATIONAL COMMERCIAL BANKS [6021]
		IRS NUMBER:				942156203
		STATE OF INCORPORATION:			CA
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		1108 FIFTH AVE
		CITY:			SAN RAFAEL
		STATE:			CA
		ZIP:			94901
		BUSINESS PHONE:		(707) 863-6000

	MAIL ADDRESS:	
		STREET 1:		4550 MANGELS BLVD
		STREET 2:		A-2Y
		CITY:			FAIRFIELD
		STATE:			CA
		ZIP:			94585-1200

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	INDEPENDENT BANKSHARES CORP
		DATE OF NAME CHANGE:	19830801
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>form4.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
Document 1 - file: form4.html

Document 1 - RAW XML: form4.xml

</DOCUMENT>
</SEC-DOCUMENT>