Prospectus Certification by Investment Company (Form 497J)

LEGG MASON PARTNERS INSTITUTIONAL TRUST

		ROPES & GRAY LLP PRUDENTIAL TOWER 800 BOYLSTON STREET BOSTON, MA 02199-3600 WWW.ROPESGRAY.COM

July 1, 2022 VIA EDGAR		Adam M. Schlichtmann T +1 617 951 7114 F +1 617 235 7346 [email protected]

Securities and Exchange Commission

100 F Street, NE

Washington, DC 20549

Re:	Legg Mason Partners Institutional Trust (the "Registrant")

(Registration Nos. 033-49552 and 811-06740)

Ladies and Gentlemen:

Pursuant to Rule 497(j) under the Securities Act of 1933, as amended (the "Securities Act"), the undersigned has been authorized by the Registrant to submit this filing in lieu of a filing under Rule 497(c) under the Securities Act, and to certify (a) that the forms of prospectus and statement of additional information used with respect to Western Asset SMASh Series C Fund, Western Asset SMASh Series Core Completion Fund, Western Asset SMASh Series Core Plus Completion Fund, Western Asset SMASh Series M Fund and Western Asset SMASh Series TF Fund, each a series of the Registrant, do not differ from those contained in Post-Effective Amendment No. 144 to the Registrant's Registration Statement ("Amendment No. 144"), and (b) that Amendment No. 144 was filed electronically.

Any questions or comments regarding this matter should be directed to the undersigned at (617) 951-7114.

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