**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 this                report; |
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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. | The                registrant’s other certifying officer and I are responsible                for establishing                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 offinancial                    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. | The                  registrant’s other certifying officer(s) and I have disclosed, based on                  our                  most recent evaluation of internal control over financial reporting,                  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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| /s/                Mason N. Carter     |
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| Mason                N. Carter         |
| Chairman,                President and |
| Chief                Executive Officer |

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