Exhibit 32

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

Joseph D. Roberto, Chairman, President and Chief Executive Officer and Scott D. Nogles, Executive Vice President and Chief Financial Officer of PCSB Financial Corporation (the “Company”) each certify in their capacity as an officer of the Company that they have reviewed the annual report of the Company on Form 10-K for the fiscal year ended June 30, 2018 and that to the best of their knowledge:

(1) the report fully complies with the requirements of Section 13(a) of the Securities Exchange Act of 1934; and

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

The purpose of this statement is solely to comply with Title 18, Chapter 63, Section 1350 of the United States Code, as amended by Section 906 of the Sarbanes-Oxley Act of 2002.

Date: September 13, 2018	/s/ Joseph D. Roberto
	Joseph D. Roberto
	Chairman, President and Chief Executive Officer
Date: September 13, 2018	/s/ Scott D. Nogles
	Scott D. Nogles
	Executive Vice President and Chief Financial Officer