2018 in the environment

This is a list of notable events relating to the environment in 2018. They relate to environmental law, conservation, environmentalism and environmental issues.

• Ongoing – Climate change litigation
• February 9 - The United States Bipartisan Budget Act of 2018 is signed into law, which includes environmental disaster relief.
• April 13 – 2018 Hawaii floods: Heavy rainfall on the islands of Kauaʻi and Oʻahu causes widespread flash flooding and landslides, resulting in $125 million in property damage.
• June 15 – the Australian Kosciuszko Wild Horse Heritage Act 2018 (NSW) given assent.
• October 28 – the America's Water Infrastructure Act of 2018 is signed into law.
• December 18 - EU enacts the Electronic Communications Code Directive 2018.

• Human impact on the environment
• List of environmental issues
• List of years in the environment