Cohen & Steers Real Estate Securities Fund, Inc.

1166 Avenue of the Americas, 30^th Floor

New York, NY 10036

May 2, 2024

VIA EDGARLINK

Securities and Exchange Commission

100 F. Street, N.E.

Washington, D.C. 20549

Ladies and Gentlemen:

On behalf of Cohen & Steers Real Estate Securities Fund, Inc. (the “Corporation”), we hereby certify pursuant to paragraph (j) of Rule 497 under the Securities Act of 1933, that (a) the form of Prospectus and Statement of Additional Information (“SAI”) dated May 1, 2024 being used in connection with the offering of shares of the Corporation do not differ from those contained in Post-Effective AmendmentNo. 47 to the Corporation’s Registration Statement, and (b) that Post-Effective Amendment No. 47 was filed electronically with the Securities and Exchange Commission (Accession No. 0001193125-24-122162) on April 29, 2024.

If you should have any questions or comments regarding the forgoing, please call the undersigned at (212) 796-9347.

Sincerely,

/s/ Dana A. DeVivo

Dana A. DeVivo

Secretary and Chief Legal Officer