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Castellum, Inc.

1934 Old Gallows Road, Suite 350

Vienna, VA 22182

January 23, 2025

United States Securities and Exchange Commission

Division of Corporation Finance

Office of Trade & Services

100 F Street, N.E.

Washington, D.C. 20549

Re:			Castellum, Inc.
			Registration Statement on Form S-3 (File No. 333-284205)

Ladies and Gentlemen:

In accordance with Rule 460 and 461 of the Securities Act of 1933, as amended, Castellum, Inc. hereby respectfully requests that the effective date of the above-captioned Registration Statement be accelerated so that it will be declared effective at 5:00 p.m. Eastern Time on Friday, January 24, 2025, or as soon thereafter as possible.

Very Truly Yours,
CASTELLUM, INC.
/s/ Glen R. Ives
Glen R. Ives
Chief Executive Officer (Principal Executive Officer)