WASHINGTON, D.C. 20549

                                    FORM 8-K

                                 CURRENT REPORT
                     Pursuant to Section 13 or 15(d) of the
                         Securities Exchange Act of 1934

        Date of Report (Date of earliest event reported): May 13, 2003

                            MERRIMAC INDUSTRIES, INC.
             (Exact name of Registrant as specified in its charter)

         Delaware                   0-11201                    22-1642321
         --------                   -------                    ----------
(State of incorporation)  (Commission File Number)            (IRS Employer
                                                          Identification Number)

               41 Fairfield Place, West Caldwell, New Jersey 07006
                    (Address of Principal Executive Offices)

                  Registrant's telephone number: (973) 575-1300

Item 7. Financial Statements and Exhibits

        (c) Exhibits.

99.1    Press release issued by Merrimac Industries, Inc. dated May 13, 2003

Item 9. Regulation FD Disclosure

        This information, furnished under this "Item 9. Regulation FD
        Disclosure," is intended to be furnished under "Item 12. Disclosure of
        Results of Operations and Financial Condition" in accordance with SEC
        Release No. 33-8216.

        On May 13, 2003, Merrimac Industries, Inc. issued a press release
        announcing financial earnings results for the quarter ended March 29,
        2003. A copy of this press release is attached as Exhibit 99.1.


        Pursuant to the requirements of the Securities Exchange Act of 1934,
Registrant has duly caused this Report to be signed on its behalf by the
undersigned hereunto duly authorized.

Dated May 14, 2003

                                        MERRIMAC INDUSTRIES, INC.

                                        By: /s/ Robert V. Condon
                                        Name: Robert V. Condon
                                        Title: Vice President, Finance and
                                        Chief Financial Officer