1964 in the environment

This is a list of notable events relating to the environment in 1964. They relate to environmental law, conservation, environmentalism and environmental issues.

January

 * The United States Army Corps of Engineers built a dike around the Estelline Salt Springs which caused an increase in salinity, driving many species to extinction, including Hemigrapsus estellinensis and an undescribed barnacle.

April

 * Rachel Carson, author of the influential book Silent Spring, dies at the age of 56.