<SUBMISSION>
<ACCESSION-NUMBER>0001209191-05-023801
<TYPE>3/A
<PUBLIC-DOCUMENT-COUNT>2
<PERIOD>20050406
<FILING-DATE>20050504
<DATE-OF-FILING-DATE-CHANGE>20050504
<ISSUER>
<COMPANY-DATA>
<CONFORMED-NAME>FINANCIAL INSTITUTIONS INC
<CIK>0000862831
<ASSIGNED-SIC>6021
<IRS-NUMBER>160816610
<STATE-OF-INCORPORATION>NY
<FISCAL-YEAR-END>1231
</COMPANY-DATA>
<BUSINESS-ADDRESS>
<STREET1>220 LIBERTY STREET
<CITY>WARSAW
<STATE>NY
<ZIP>14569
<PHONE>7167861100
</BUSINESS-ADDRESS>
<MAIL-ADDRESS>
<STREET1>220 LIBERTY STREET
<CITY>WARSAW
<STATE>NY
<ZIP>14569
</MAIL-ADDRESS>
</ISSUER>
<REPORTING-OWNER>
<OWNER-DATA>
<CONFORMED-NAME>BIRMINGHAM MARTIN KEARNEY
<CIK>0001323659
</OWNER-DATA>
<FILING-VALUES>
<FORM-TYPE>3/A
<ACT>34
<FILE-NUMBER>000-26481
<FILM-NUMBER>05798790
</FILING-VALUES>
<BUSINESS-ADDRESS>
<PHONE>585-786-1100
</BUSINESS-ADDRESS>
<MAIL-ADDRESS>
<STREET1>220 LIBERTY STREET
<CITY>WARSAW
<STATE>NY
<ZIP>14569
</MAIL-ADDRESS>
</REPORTING-OWNER>
<DOCUMENT>
<TYPE>3/A
<SEQUENCE>1
<FILENAME>doc3a.xml
<DESCRIPTION>FORM 3/A SUBMISSION
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>3/A</documentType>

    <periodOfReport>2005-04-06</periodOfReport>

    <dateOfOriginalSubmission>2005-04-14</dateOfOriginalSubmission>

    <noSecuritiesOwned>0</noSecuritiesOwned>

    <issuer>
        <issuerCik>0000862831</issuerCik>
        <issuerName>FINANCIAL INSTITUTIONS INC</issuerName>
        <issuerTradingSymbol>FISI</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001323659</rptOwnerCik>
            <rptOwnerName>BIRMINGHAM MARTIN KEARNEY</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>220 LIBERTY STREET</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>WARSAW</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>14569</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>Senior Vice President</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <derivativeTable>
        <derivativeHolding>
            <securityTitle>
                <value>Stock Option (right to buy)</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>20.39</value>
            </conversionOrExercisePrice>
            <exerciseDate>
                <footnoteId id="F1"/>
            </exerciseDate>
            <expirationDate>
                <value>2015-03-16</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>4596</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeHolding>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">The option vests in four equal annual installlments beginning on March 16, 2006.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>Sonia M. Dumbleton for Martin K. Birminghham</signatureName>
        <signatureDate>2005-05-04</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>EX-24.3A_83808
<SEQUENCE>2
<FILENAME>poa.txt
<DESCRIPTION>POA DOCUMENT
<TEXT>
 AUTHORIZATION TO FILE SECTION 16 REPORTS

I hereby authorize and
designate Ronald A. Miller, Sonia M. Dumbleton
or Michael D. Grover to
execute and file or cause to be filed, on my
behalf any Forms 3, 4 and 5,
including any amendments thereto, that I
may voluntarily or be required
to file with the U.S. Securities and
Exchange Commission as a result of
my ownership of, or transactions in,
securities of Financial
Institutions, Inc.  This authority shall
continue until I am no longer
required to file such forms, or until
sooner revoked by me in writing.


In witness whereof, I have executed this authorization this 12th day of

April 2005.

							Martin K. Birmingham

						-------------------------------
						    Chief Executive
Officer
						    National Bank of Geneva


Sandra L. O'Neil

------------------
Witness
</TEXT>
</DOCUMENT>
</SUBMISSION>
