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Exhibit 32.1

CERTIFICATIONS OF PRINCIPAL EXECUTIVE OFFICER AND PRINCIPAL FINANCIAL OFFICER

PURSUANT TO 18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

Pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, I, Johanna (Hanneke) Faber, Chief Executive Officer of Logitech International S.A. (the “Company”) hereby certify, that, to the best of my knowledge:

(1)The Annual Report on Form 10-K for the period ended March 31, 2026 (the "Report") of the Company fully complies with the requirements of Section 13(a) or 15(d) of the Exchange Act; and

(2)The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

						May 21, 2026
						/s/ Johanna (Hanneke) Faber
						Johanna (Hanneke) Faber Chief Executive Officer

Pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, I, Matteo Anversa, Chief Financial Officer of Logitech International S.A. (the “Company”) hereby certify, that, to the best of my knowledge:

(1)The Annual Report on Form 10-K for the period ended March 31, 2026 (the "Report") of the Company fully complies with the requirements of Section 13(a) or 15(d) of the Exchange Act; and

(2)The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

						May 21, 2026
						/s/ Matteo Anversa
						Matteo Anversa Chief Financial Officer