-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 Pm15DFoCUC7zMUaiYMM0dsOK1s9n//zSdqqqTVGE5diIQ2GVNvJIEwpW+L/BHY+d
 haNnk7XZRRrOabJTMOvVgw==

<SEC-DOCUMENT>0001260415-10-000045.txt : 20101005
<SEC-HEADER>0001260415-10-000045.hdr.sgml : 20101005
<ACCEPTANCE-DATETIME>20101005183436
ACCESSION NUMBER:		0001260415-10-000045
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20101005
FILED AS OF DATE:		20101005
DATE AS OF CHANGE:		20101005

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Ursprung Cecil
		CENTRAL INDEX KEY:			0001388697

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-27503
		FILM NUMBER:		101110417

	MAIL ADDRESS:	
		STREET 1:		120 DARLING DRIVE
		CITY:			AVON
		STATE:			CT
		ZIP:			06001-4217

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>2010-10-05</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

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

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001388697</rptOwnerCik>
            <rptOwnerName>Ursprung Cecil</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>27 WALBRIDGE ROAD</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>WEST HARTFORD</rptOwnerCity>
            <rptOwnerState>CT</rptOwnerState>
            <rptOwnerZipCode>06119</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2010-10-05</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>J</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F1"/>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>2500</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>2.5</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>120553</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">Issued as preferred stock dividends</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>Cecil Ursprung</signatureName>
        <signatureDate>2010-10-05</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
-----END PRIVACY-ENHANCED MESSAGE-----