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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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MIC-Info: RSA-MD5,RSA,
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<SEC-DOCUMENT>0001260415-10-000048.txt : 20101021
<SEC-HEADER>0001260415-10-000048.hdr.sgml : 20101021
<ACCEPTANCE-DATETIME>20101021185815
ACCESSION NUMBER:		0001260415-10-000048
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20101004
FILED AS OF DATE:		20101021
DATE AS OF CHANGE:		20101021

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Lowell Oster Allen
		CENTRAL INDEX KEY:			0001491956

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-27503
		FILM NUMBER:		101135910

	MAIL ADDRESS:	
		STREET 1:		589 FOX HUNT CIRCLE
		CITY:			LONGWOOD
		STATE:			FL
		ZIP:			32750

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			DYNASIL CORP OF AMERICA
		CENTRAL INDEX KEY:			0000030831
		STANDARD INDUSTRIAL CLASSIFICATION:	GLASS, GLASSWARE, PRESSED OR BLOWN [3220]
		IRS NUMBER:				221734088
		STATE OF INCORPORATION:			NJ
		FISCAL YEAR END:			0930

	BUSINESS ADDRESS:	
		STREET 1:		385 COOPER RD
		CITY:			WEST BERLIN
		STATE:			NJ
		ZIP:			08091
		BUSINESS PHONE:		8567674600

	MAIL ADDRESS:	
		STREET 1:		385 COOPER RD
		CITY:			WEST BERLIN
		STATE:			NJ
		ZIP:			08091
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>primary_doc.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0303</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2010-10-04</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000030831</issuerCik>
        <issuerName>DYNASIL CORP OF AMERICA</issuerName>
        <issuerTradingSymbol>DYSL:OB</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001491956</rptOwnerCik>
            <rptOwnerName>Lowell Oster Allen</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>589 FOX HUNT CIRCLE</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>LONGWOOD</rptOwnerCity>
            <rptOwnerState>FL</rptOwnerState>
            <rptOwnerZipCode>32750</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>VP of Strategic Marketing</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2010-10-04</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>J</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F1"/>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>1384</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>3.6125</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>1384</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">Acquisition of shares under the Employee Stock Purchase Plan in a transaction exempt under Rule 16b-3(c)</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>Lowell Oster</signatureName>
        <signatureDate>2010-10-21</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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