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 June
     30, 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: August 14, 2006                            Date: August 14, 2006