We are activists, environmentalists and explorers.
Founded by John Muir in 1892, the Sierra Club works to protect communities, conserve wild places, and explore nature. The Chicago Sierra Club is 7,500 members strong. Our territory stretches south from the Lake County line to the Indiana border, west to part of La Grange, and north through Niles and Skokie. We are active in environmental issues, electoral campaigns, and social events.
Check our Calendar below for information on some of our upcoming events. Visit the Volunteer tab above to find information on teams and leaders who can help you get involved, and follow us on Facebook and Twitter to stay up to date.
Chicago Sierra Club Events Calendar
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Local News and Information
Announcing our Chicago election endorsements
December 14, 2022
Meet our environmental champions in the 2023 Chicago municipal elections!
Sierra Club Illinois and Sierra Club Chicago Group seek to elect environmental champions who will work to address the climate crisis and build a more equitable city by...
Understanding Chicago’s Water: Sampling in winter weather conditions
February 28, 2022
By Jeff Shelden
Come rain, shine, sleet, or snow, the Chicago Group’s community scientists conduct water sampling at 11 sites along the Chicago River. Seeing the changes in scenery and vegetation over each season is both fascinating and...
Understanding Chicago's Water: Maintaining and Sharing Water Quality Data
November 29, 2021
By Sarah Buchhorn
As with other aspects of the Water Sampling Program, the Chicago Group Water Team’s approach to collecting, maintaining, and sharing water quality data evolved over time. When I became involved with the water team in 2018,...