**EXHIBIT      31.1**

**CERTIFICATION**

| 1. | I                have reviewed this quarterly report on Form 10-Q of Merrimac Industries,                Inc.; |
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| 2. | Based                on my knowledge, this report does not contain any untrue statement                of                a                material fact or omit to state a material fact necessary to make                the                statements                  made, in light of the circumstances under which such statements                  were                  made, not misleading with respect to the period covered by                  thisreport; |
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| 3. | Based                on my knowledge, the financial statements, and other financial                information                included in this report, fairly present in all material respects                the financial condition, results of operations and cash flows of                the                registrant as of, and for, the periods presented in this                report; |
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| 4. | I                am responsible forestablishing and maintaining disclosure controls                and                procedures (as defined                in Exchange Act Rules 13a-15(e) and 15d-15(e))and internal control                over                financial reporting (as defined in Exchange Act Rules 13a-15(f) and                15d-15(f) for                the registrant and have: |
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|  | (a) | Designed                such disclosure controls and procedures, or caused such disclosure                controls and procedures to be designed under our supervision,                to ensure that material information relating to the registrant,                including its consolidated subsidiaries, is made known to                us by others within those entities, particularly during the                 period                in which this report is being                prepared; |
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|   | (b)  | Designed such internal control over              financial              reporting, or caused such internal control over financial reporting              to be              designed under our supervision, to provide reasonable assurance regarding              the reliability of financial              reporting and the preparation of financial statements for external              purposes              in accordance with generally accepted accounting              principles; |
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|   | (c) | Evaluated the effectiveness of the              registrant’s disclosure controls and              procedures and presented in this report our conclusions about              the effectiveness              of the disclosure controls and procedures, as of the end              of the period covered by this report based on such evaluation;              and |
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|   | (d) | Disclosed in this report any change              in the              registrant's internal control              over financial reporting that occurred during the registrant’s              most              recent fiscal quarter that has materially affected, or is reasonably              likely to materially affect, the registrant’s internal control              over financial reporting; and |
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| 5. | I                have disclosed, based on our most recent evaluation of internal control                over financialreporting, to the registrant’s auditors and the audit                committee of the registrant’s board of directors (or persons performing                the equivalent functions): |
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|  | (a) | All                significant deficiencies and material weaknesses in the design                or operation of internal control over financial reporting which                are reasonably likely to adversely affect the registrant’s ability                to                record, process, summarize and report financial information; and |
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|  | (b) | Any                fraud, whether or not material, that involves management or other                employees who have a significant role in the registrant’s internal                control over financial reporting. |
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