The Fiscal Year 2025 Transit Security Grant Program (TSGP) is a grant program that provides funds to transit agencies to protect critical surface transportation infrastructure and the traveling public from acts of terrorism. The program is part of a comprehensive set of measures authorized by Congress and implemented by the Department of Homeland Security to help strengthen the nation’s critical infrastructure against risks associated with potential terrorist attacks. The grant program requires applicants to submit a Five-Year Security Capital and Operational Sustainment Plan, which must include how the agency proposes to implement capital projects and demonstrate how the agency will sustain the operational investments and capabilities after grant funding has been expended. • The grant program is open to city or township governments and county governments. • The estimated funding for the grant program is $83,700,000. • The grant program requires applicants to submit electronic file attachments to the grant application. • The grant program has a deadline for submission of August 15, 2025.