Creates the Local Government Zero Emissions Transition Grant Program Act. Requires the Environmental Protection Agency to establish and administer a Local Government Zero Emissions Transition Grant Program. Delineates the program into two Phases. Provides that Phase 1 requires an application to the Agency by a local government stating a local ordinance or nonbinding declaration has been voted on regarding transition of the local government's vehicle fleet to zero emissions by 2030. Limits Phase 1 grants to a maximum of $50,000 with at least a 20% match from the applicant. Requires applications under Phase 2 of the program to be predicated on either completion of an evaluative study regarding readiness for electric vehicles by the local government or completion of Phase 1 of the program. Provides that Phase 2 of the program requires an application to the Agency by a local government stating defined goals and projects in the transition of the local government's vehicle fleet, including building electric vehicle infrastructure, increasing load capacity, training staff, and other defined goals and projects. Gives priority to applicants based on planned date for transition to zero emissions, the effects of climate change and carbon pollution on the local government, and the percentage of the local government's fleet converted. Defines local government units under the Act to municipalities, townships, and counties; defines other terms. Permits the adoption of rules by the Agency.