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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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MIC-Info: RSA-MD5,RSA,
 PQp3xWTO+5nVBuNWzaMesYgn5zbjuHdxiXQMSkDpV7XCS5lKga4eMpARLdHkbZMI
 RaKt/2CD1ZtVW6oF0AtAmg==

<SEC-DOCUMENT>0001260415-09-000043.txt : 20091028
<SEC-HEADER>0001260415-09-000043.hdr.sgml : 20091028
<ACCEPTANCE-DATETIME>20091028170412
ACCESSION NUMBER:		0001260415-09-000043
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20091028
FILED AS OF DATE:		20091028
DATE AS OF CHANGE:		20091028

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Dunham Craig T
		CENTRAL INDEX KEY:			0001305499

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-27503
		FILM NUMBER:		091142318

	MAIL ADDRESS:	
		STREET 1:		DYNASIL CORPORATION
		STREET 2:		385 COOPER ROAD
		CITY:			WEST BERLIN
		STATE:			NJ
		ZIP:			08091

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>2009-10-28</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

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

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001305499</rptOwnerCik>
            <rptOwnerName>Dunham Craig T</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>DYNASIL CORPORATION</rptOwnerStreet1>
            <rptOwnerStreet2>385 COOPER ROAD</rptOwnerStreet2>
            <rptOwnerCity>WEST BERLIN</rptOwnerCity>
            <rptOwnerState>NJ</rptOwnerState>
            <rptOwnerZipCode>08091</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>President and CEO</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2009-10-28</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>600000</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>2.33</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>2264439</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <ownerSignature>
        <signatureName>Craig T. Dunham</signatureName>
        <signatureDate>2009-10-28</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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