COLUMBIA MANAGEMENT


October 5, 2006

VIA EDGAR

Securities and Exchange Commission
100 F Street, N.E.
Washington, D.C. 20549

RE:   Columbia Funds Series Trust I (the "Trust")
                   Columbia High Yield Opportunity Fund
                   Columbia Strategic Income Fund (the "Funds")
                   Registration Nos.:  2-99356 & 811-04367

Ladies and Gentlemen:

Pursuant to the requirements of Rule 497(j) under the Securities Act of 1933, as
amended, please accept this letter as certification that the Prospectuses and
Statement of Additional Information dated October 1, 2006 for the Funds do not
differ from that contained in Post-Effective Amendment No. 50 (the "Amendment")
to the Trust's Registration Statement on Form N-1A. The Amendment was filed
electronically on September 28, 2006.

The Funds' Prospectuses and Statement of Additional Information dated October 1,
2006 are now being used in connection with the public offering and sale of
shares of the Funds.

Very truly yours,


COLUMBIA FUNDS SERIES TRUST I


     /s/ Patrick Gannon
 By: Patrick Gannon
     Legal Product Manager


                                                                  MA5-515-11-05
                                         One Financial Center, Boston, MA 02111


Columbia Management is the primary asset management group and a nonbank
subsidiary of Bank of America Corporation


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