The Department of Climate, Environment and Energy (Irish: An Roinn Aeráide, Comhshaoil agus Fuinnimh) is a department of the Government of Ireland that is responsible for the telecommunications and broadcasting sectors and regulates, protects and develops the natural resources of Ireland.

The official headquarters and ministerial offices of the Department are at Tom Johnson House, Beggar's Bush, Dublin.

The departmental team consists of the following: The Department of Environment, Climate and Communications is subdivided into the following divisions: Among the State Agencies and other bodies affiliated to the Department in some way are: Among the state-sponsored bodies of Ireland under the aegis of the Minister are: The Department of Fisheries was created in 1921 during the Ministry of Dáil Éireann.

It was given a statutory basis by the Ministers and Secretaries Act 1924, soon after the establishment of the Irish Free State in 1922.

This act provided it with:[1] the administration and business generally of public services in connection with fisheries, including deep-sea fisheries, tidal waters fisheries, coastal fisheries, inland waters fisheries, and industries connected with or auxiliary to the same, and all powers duties and functions connected with the same, and shall include in particular the business powers, duties and functions of the branches and officers of the public services specified in the Seventh Part of the Schedule to this Act, and of which Department the head shall be, and shall be styled, an t-Aire Iascaigh or (in English) the Minister for Fisheries.The Schedule assigned it with the duties of the following bodies:[2] The name and functions of the department have changed several times by statutory instruments.