Exhibit 99.1 FOR RELEASE Date: July 23, 2025 For Further Information Contact: Donald E. Gibson President & CEO (518) 943-2600 donaldg@tbogc.com Nick Barzee SVP & CFO (518) 943-2600 nickb@tbogc.com Greene County Bancorp, Inc. Reports Record High Net Income of $31.1 Million for the Fiscal Year Ended June 30, 2025, Announces Plans to Expand into Saratoga County Catskill, N.Y. – July 23, 2025 - Greene County Bancorp, Inc. (the "Company") (NASDAQ: GCBC), the holding company for the Bank of Greene County and its ...