-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
Originator-Key-Asymmetric:
 MFgwCgYEVQgBAQICAf8DSgAwRwJAW2sNKK9AVtBzYZmr6aGjlWyK3XmZv3dTINen
 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 V5a1TOzBlvh90ScS8vQpvzkZQIjXBLCBJR22U2m7SrzdeDuyvwrjfmptCxx/B4R2
 Luk4BeqEzaCBEx71nKxhEw==

<SEC-DOCUMENT>0000754811-06-000047.txt : 20060602
<SEC-HEADER>0000754811-06-000047.hdr.sgml : 20060602
<ACCEPTANCE-DATETIME>20060602130431
ACCESSION NUMBER:		0000754811-06-000047
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20060531
FILED AS OF DATE:		20060602
DATE AS OF CHANGE:		20060602

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			U S GLOBAL INVESTORS INC
		CENTRAL INDEX KEY:			0000754811
		STANDARD INDUSTRIAL CLASSIFICATION:	INVESTMENT ADVICE [6282]
		IRS NUMBER:				741598370
		STATE OF INCORPORATION:			TX
		FISCAL YEAR END:			0630

	BUSINESS ADDRESS:	
		STREET 1:		7900 CALLAGHAN RD
		CITY:			SAN ANTONIO
		STATE:			TX
		ZIP:			78229
		BUSINESS PHONE:		2103081234

	MAIL ADDRESS:	
		STREET 1:		7900 CALLAGHAN ROAD
		CITY:			SAN ANTONIO
		STATE:			TX
		ZIP:			78229

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	UNITED SERVICES ADVISORS INC /TX/
		DATE OF NAME CHANGE:	19950321

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Rademacher Catherine Ann
		CENTRAL INDEX KEY:			0001305114

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-13928
		FILM NUMBER:		06882367

	BUSINESS ADDRESS:	
		BUSINESS PHONE:		210-308-1234

	MAIL ADDRESS:	
		STREET 1:		7900 CALLAGHAN ROAD
		CITY:			SAN ANTONIO
		STATE:			TX
		ZIP:			78229
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>primary_doc.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2006-05-31</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000754811</issuerCik>
        <issuerName>U S GLOBAL INVESTORS INC</issuerName>
        <issuerTradingSymbol>GROW</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001305114</rptOwnerCik>
            <rptOwnerName>Rademacher Catherine Ann</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>7900 CALLAGHAN ROAD</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>SAN ANTONIO</rptOwnerCity>
            <rptOwnerState>TX</rptOwnerState>
            <rptOwnerZipCode>78229</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>Chief Financial Officer</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Class A Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2006-05-31</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>J</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F1"/>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>22</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>22.68</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>1116</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">Restricted stock purchase under employee stock purchase plan.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>Catherine A. Rademacher, Chief Financial Officer</signatureName>
        <signatureDate>2006-06-02</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
-----END PRIVACY-ENHANCED MESSAGE-----