<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0508</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2025-06-17</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001156041</issuerCik>
        <issuerName>HOUSTON AMERICAN ENERGY CORP</issuerName>
        <issuerTradingSymbol>HUSA</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001508592</rptOwnerCik>
            <rptOwnerName>LONGO PETER F.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O HOUSTON AMERICAN ENERGY CORP.</rptOwnerStreet1>
            <rptOwnerStreet2>801 TRAVIS STREET, SUITE 1425</rptOwnerStreet2>
            <rptOwnerCity>HOUSTON</rptOwnerCity>
            <rptOwnerState>TX</rptOwnerState>
            <rptOwnerZipCode>77002</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>CEO and President</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <aff10b5One>0</aff10b5One>

    <derivativeTable>
        <derivativeTransaction>
            <securityTitle>
                <value>Stock option (right to buy)</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>16.3</value>
                <footnoteId id="F13"/>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2025-01-15</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>920.25</value>
                    <footnoteId id="F1"/>
                    <footnoteId id="F13"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <value>2025-07-15</value>
                <footnoteId id="F2"/>
            </exerciseDate>
            <expirationDate>
                <value>2035-01-15</value>
                <footnoteId id="F2"/>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>920.25</value>
                    <footnoteId id="F1"/>
                    <footnoteId id="F13"/>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>3152.24</value>
                    <footnoteId id="F13"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>
        <derivativeTransaction>
            <securityTitle>
                <value>Stock option (right to buy)</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>14.1</value>
                <footnoteId id="F13"/>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2025-02-15</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>1063.83</value>
                    <footnoteId id="F3"/>
                    <footnoteId id="F13"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <value>2025-08-15</value>
                <footnoteId id="F4"/>
            </exerciseDate>
            <expirationDate>
                <value>2035-02-15</value>
                <footnoteId id="F4"/>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>1063.83</value>
                    <footnoteId id="F3"/>
                    <footnoteId id="F13"/>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>4216.07</value>
                    <footnoteId id="F13"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>
        <derivativeTransaction>
            <securityTitle>
                <value>Stock option (right to buy)</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>10.7</value>
                <footnoteId id="F13"/>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2025-03-15</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>1401.87</value>
                    <footnoteId id="F5"/>
                    <footnoteId id="F13"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <value>2025-09-15</value>
                <footnoteId id="F6"/>
            </exerciseDate>
            <expirationDate>
                <value>2035-03-15</value>
                <footnoteId id="F6"/>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>1401.87</value>
                    <footnoteId id="F5"/>
                    <footnoteId id="F13"/>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>5617.93</value>
                    <footnoteId id="F13"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>
        <derivativeTransaction>
            <securityTitle>
                <value>Stock option (right to buy)</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>5.6</value>
                <footnoteId id="F13"/>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2025-04-15</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>2678.57</value>
                    <footnoteId id="F7"/>
                    <footnoteId id="F13"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <value>2025-10-15</value>
                <footnoteId id="F8"/>
            </exerciseDate>
            <expirationDate>
                <value>2035-04-15</value>
                <footnoteId id="F8"/>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>2678.57</value>
                    <footnoteId id="F7"/>
                    <footnoteId id="F13"/>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>8296.51</value>
                    <footnoteId id="F13"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>
        <derivativeTransaction>
            <securityTitle>
                <value>Stock option (right to buy)</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>6.8</value>
                <footnoteId id="F13"/>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2025-05-15</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>2205.88</value>
                    <footnoteId id="F9"/>
                    <footnoteId id="F13"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <value>2025-11-15</value>
                <footnoteId id="F10"/>
            </exerciseDate>
            <expirationDate>
                <value>2035-05-15</value>
                <footnoteId id="F10"/>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>2205.88</value>
                    <footnoteId id="F9"/>
                    <footnoteId id="F13"/>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>10502.39</value>
                    <footnoteId id="F13"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>
        <derivativeTransaction>
            <securityTitle>
                <value>Stock option (right to buy)</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>10.6</value>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2025-06-17</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>1415.09</value>
                    <footnoteId id="F11"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <value>2025-12-17</value>
                <footnoteId id="F12"/>
            </exerciseDate>
            <expirationDate>
                <value>2035-06-17</value>
                <footnoteId id="F12"/>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>1415.09</value>
                    <footnoteId id="F11"/>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>11917.48</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">On January 15, 2025, the reporting person received a grant of options to acquire a number of shares of the Company's common stock equal to $15,000 divided by the then trading price per share of the Company's common stock, which was $1.63 per share (the trading price for the last business day before the grant date).  Therefore, on January 15, 2025, 9,202.45 options were granted to the reporting person.  Since the date of issue, the Company effected a 10-for-1 reverse stock split which became market effective on June 9, 2025. The number of options initially issued was 10 times more than the number set forth in the table above and the exercise price was 1/10th of the price set forth in the table. As a result, the number of shares for which the options are exercisable and the exercise price in the above table have been adjusted to reflect the 10-to-1 reverse stock split.</footnote>
        <footnote id="F2">The options were granted on January 15, 2025 and are exercisable six months from the date of grant.  The options vest 20% on the date of grant and 80% nine months from the date of grant.</footnote>
        <footnote id="F3">On February 15, 2025, the reporting person received a grant of options to acquire a number of shares of the Company's common stock equal to $15,000 divided by the then trading price per share of the Company's common stock, which was $1.41 per share (the trading price for the last business day before the grant date).  Therefore, on February 15, 2025, 10,638.30 options were granted to the reporting person. Since the date of issue, the Company effected a 10-for-1 reverse stock split which became market effective on June 9, 2025. The number of options initially issued was 10 times more than the number set forth in the table above and the exercise price was 1/10th of the price set forth in the table. As a result, the number of shares for which the options are exercisable and the exercise price in the above table have been adjusted to reflect the 10-to-1 reverse stock split.</footnote>
        <footnote id="F4">The options were granted on February 15, 2025 and are exercisable six months from the date of grant.  The options vest 20% on the date of grant and 80% nine months from the date of grant.</footnote>
        <footnote id="F5">On March 15, 2025, the reporting person received a grant of options to acquire a number of shares of the Company's common stock equal to $15,000 divided by the then trading price per share of the Company's common stock, which was $1.07 per share (the trading price for the last business day before the grant date).  Therefore, on March 15, 2025, 14,018.69 options were granted to the reporting person. Since the date of issue, the Company effected a 10-for-1 reverse stock split which became market effective on June 9, 2025. The number of options initially issued was 10 times more than the number set forth in the table above and the exercise price was 1/10th of the price set forth in the table. As a result, the number of shares for which the options are exercisable and the exercise price in the above table have been adjusted to reflect the 10-to-1 reverse stock split.</footnote>
        <footnote id="F6">The options were granted on March 15, 2025 and are exercisable six months from the date of grant. The options vest 20% on the date of grant and 80% nine months from the date of grant.</footnote>
        <footnote id="F7">On April 15, 2025, the reporting person received a grant of options to acquire a number of shares of the Company's common stock equal to $15,000 divided by the then trading price per share of the Company's common stock, which was $0.56 per share (the trading price for the last business day before the grant date).  Therefore, on April 15, 2025, 26,785.71 options were granted to the reporting person.  Since the date of issue, the Company effected a 10-for-1 reverse stock split which became market effective on June 9, 2025.  The number of options initially issued was 10 times more than the number set forth in the table above and the exercise price was 1/10th of the price set forth in the table.  As a result, the number of shares for which the options are exercisable and the exercise price in the above table have been adjusted to reflect the 10-to-1 reverse stock split.</footnote>
        <footnote id="F8">The options were granted on April 15, 2025 and are exercisable six months from the date of grant.  The options vest 20% on the date of grant and 80% nine months from the date of grant.</footnote>
        <footnote id="F9">On May 15, 2025, the reporting person received a grant of options to acquire a number of shares of the Company's common stock equal to $15,000 divided by the then trading price per share of the Company's common stock, which was $0.68 per share (the trading price for the last business day before the grant date).  Therefore, on May 15, 2025, 22,058.82 options were granted to the reporting person.  Since the date of issue, the Company effected a 10-for-1 reverse stock split which became market effective on June 9, 2025.  The number of options initially issued was 10 times more than the number set forth in the table above and the exercise price was 1/10th of the price set forth in the table.  As a result, the number of shares for which the options are exercisable and the exercise price in the above table have been adjusted to reflect the 10-to-1 reverse stock split.</footnote>
        <footnote id="F10">The options were granted on May 15, 2025 and are exercisable six months from the date of grant.  The options vest 20% on the date of grant and 80% nine months from the date of grant.</footnote>
        <footnote id="F11">On June 17, 2025, the reporting person received a grant of options to acquire a number of shares of the Company's common stock equal to $15,000 divided by the then trading price per share of the Company's common stock, which was $10.60 per share (the trading price for the last business day before the grant date).  Therefore, on June 17, 2025, 1,415.09 options were granted to the reporting person.</footnote>
        <footnote id="F12">The options were granted on June 17, 2025 and are exercisable six months from the date of grant.  The options vest 20% on the date of grant and 80% nine months from the date of grant.</footnote>
        <footnote id="F13">Reflects the 10-for-1 reverse stock split effected by the Company which became market effective on June 9, 2025.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>Peter F. Longo</signatureName>
        <signatureDate>2025-06-17</signatureDate>
    </ownerSignature>
</ownershipDocument>
