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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 FgK/a5tAGWXqK+MBmOMOat1aC/kx8ZkogcQ7iMLubqsm22N5tQ8xqXTgnTIoma3T
 7ziYbqGCk/gu3DhgI/yftw==

<SEC-DOCUMENT>0001374991-08-000002.txt : 20080108
<SEC-HEADER>0001374991-08-000002.hdr.sgml : 20080108
<ACCEPTANCE-DATETIME>20080108144806
ACCESSION NUMBER:		0001374991-08-000002
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20071221
FILED AS OF DATE:		20080108
DATE AS OF CHANGE:		20080108

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			DELAWARE INVESTMENTS FLORIDA INSURED MUNICIPAL INCOME FUND
		CENTRAL INDEX KEY:			0000895574
		STANDARD INDUSTRIAL CLASSIFICATION:	UNKNOWN SIC - 0000 [0000]
		IRS NUMBER:				411737161
		STATE OF INCORPORATION:			MA
		FISCAL YEAR END:			0331

	BUSINESS ADDRESS:	
		STREET 1:		ONE COMMERCE SQUARE
		STREET 2:		2005 MARKET STREET
		CITY:			PHILADELPHIA
		STATE:			PA
		ZIP:			19103
		BUSINESS PHONE:		2152552127

	MAIL ADDRESS:	
		STREET 1:		ONE COMMERCE SQUARE
		STREET 2:		2005 MARKET STREET
		CITY:			PHILADELPHIA
		STATE:			PA
		ZIP:			19103

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	VOYAGEUR FLORIDA INSURED MUNICIPAL INCOME FUND
		DATE OF NAME CHANGE:	19930519

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	VOYAGEUR FLORIDA INSURD MUNICIPAL INCOME FUND
		DATE OF NAME CHANGE:	19930122

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Collins Robert
		CENTRAL INDEX KEY:			0001332184

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	811-07410
		FILM NUMBER:		08517620

	BUSINESS ADDRESS:	
		BUSINESS PHONE:		215.255.8813

	MAIL ADDRESS:	
		STREET 1:		2005 MARKET STREET
		STREET 2:		29TH FLOOR
		CITY:			PHILADELPHIA
		STATE:			PA
		ZIP:			19103
</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>2007-12-21</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000895574</issuerCik>
        <issuerName>DELAWARE INVESTMENTS FLORIDA INSURED MUNICIPAL INCOME FUND</issuerName>
        <issuerTradingSymbol>VFL</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001332184</rptOwnerCik>
            <rptOwnerName>Collins Robert</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>2005 MARKET STREET</rptOwnerStreet1>
            <rptOwnerStreet2>29TH FLOOR</rptOwnerStreet2>
            <rptOwnerCity>PHILADELPHIA</rptOwnerCity>
            <rptOwnerState>PA</rptOwnerState>
            <rptOwnerZipCode>19103</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>SVP/Senior Portfolio Manager</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock ($.01 Par Value)</value>
            </securityTitle>
            <transactionDate>
                <value>2007-12-21</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>P</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>3000</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>12</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>4800</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <ownerSignature>
        <signatureName>/s/ Robert Collins</signatureName>
        <signatureDate>2008-01-08</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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