EX-99.906CERT


                           SECTION 906 CERTIFICATIONS

Greg J. Stark, Principal Executive Officer and Chief Executive Officer; and Mark
E. Swanson, Principal Financial Officer, Principal Accounting Officer and
Treasurer of Russell Investment Funds, a Massachusetts Business Trust (the
"Registrant"), each certify that:

1.   The Registrant's periodic report on Form N-CSR for the period ended
     December 31, 2006 (the "Form N-CSR") fully complies with the requirements
     of Section 13(a) or Section 15(d) of the Securities Exchange Act of 1934,
     as amended, as applicable; and

2.   The information contained in the Form N-CSR fairly presents, in all
     material respects, the financial condition and results of operations of the
     Registrant.

A signed original of this written statement required by Section 906 has been
provided to Russell Investment Funds and will be retained by Russell Investment
Funds and furnished to the Securities and Exchange Commission or its staff upon
request.

Principal Executive Officer and                 Principal Financial Officer,
Chief Executive Officer                         Principal Accounting
Russell Investment Funds                        Officer and Treasurer
                                                Russell Investment Funds


/s/ Greg J. Stark                               /s/ Mark E. Swanson
------------------------------------            --------------------------------
Greg J. Stark                                   Mark E. Swanson


Date: February 15, 2007                         Date: February 15, 2007