245 Summer Street

Fidelity® Investments

Boston, MA 02210

October 31, 2025

U.S. Securities & Exchange Commission

100 F Street, N.E.

Washington, D.C. 20549

Attention: File Room

RE: Fidelity Union Street Trust (the trust): File Nos. 002-50318 and 811-02460 Fidelity Arizona Municipal Income Fund Fidelity Maryland Municipal Income Fund (the fund(s))

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Ladies and Gentlemen:

Transmitted herewith pursuant to Rule 497(j) under the Securities Act of 1933 is certification that the Prospectus(es) and Statement(s) of Additional Information with respect to the above referenced fund(s) do not differ from those filed in the most recent post-effective amendment, which was filed electronically.

Very truly yours,

/s/Nicole Macarchuk

Nicole Macarchuk

Secretary of the Trust