CERTIFICATION

            Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002

     Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 (subsections (a)
and (b) of section 1350, chapter 63 of title 18, United States Code), each of
the undersigned officers of Hartford Series Fund, Inc. does hereby certify, to
such officer's knowledge, that:

     The annual report on Form N-CSR of Hartford Series Fund, Inc. for the
     period ended December 31, 2005 (the "Form N-CSR") fully complies with the
     requirements of Section 13(a) or 15(d) of the Securities Exchange Act of
     1934 and information contained in the Form N-CSR fairly presents, in all
     material respects, the financial condition and results of operations of the
     Fund.


Date: February 9, 2006                  By: /s/ David M. Znamierowski
                                            ------------------------------------
                                            David M. Znamierowski
                                        Its: President


Date: February 9, 2006                  By: /s/ Tamara L. Fagely
                                            ------------------------------------
                                            Tamara L. Fagely
                                        Its: Vice President, Controller and
                                             Treasurer

A signed original of this written statement required by Section 906 has been
provided to Hartford Series Fund, Inc.and will be retained by Hartford Series
Fund, Inc. and furnished to the Securities and Exchange Commission or its staff
upon request.