The Institution of Environmental Sciences (IES) is a professional association and registered charity in the United Kingdom.

The organisation promotes environmental protection and conservation, and performs related education and meta-analysis of scientific research.

The IES provides administration for two other organisations in the UK: the Community for Environmental Disciplines in Higher Education[4] who accredit university programmes, and for the Institute of Air Quality Management.

The IES maintains the environmental SCIENTIST[5] journal, sends quarterly to members and available open access three-months after publication.

[6] The Institution of Environmental Sciences was founded as a result of an initiative by Dr John Rose during a series of meetings held during 1971-1972 at the Royal Society in London and chaired by Lord Burntwood.