The Secretariat of Environment and Natural Resources (in Spanish: Secretaría del Medio Ambiente y Recursos Naturales, SEMARNAT) is Mexico's environment ministry.

Its head, the Secretary of the Environment and Natural Resources, is a member of the federal executive cabinet and is appointed by the President of Mexico.

In September 2020, President Andrés Manuel López Obrador appointed María Luisa Albores González as Secretary of the Environment and Natural Resources, the third person to occupy the post since López Obrador became President less than two years earlier in December 2018.

The Secretariat is charged with the mission of protecting, restoring, and conserving the ecosystems, natural resources, assets and environmental services of Mexico with the goal of fostering sustainable development.

The Secretariat of Environment and Natural Resources of México is the Secretary of State to which, according to Law of Federal Public Administration in its Article 32a, corresponds to the release of the following functions: To carry out these functions, the Secretariat of Environment and Natural Resources has the following Undersecretaries: These Undersecretaries are then charged with the operation of the following units of the SEMARNAT: This Mexican government–related article is a stub.