Welcome to the Sierra Club - Wisconsin Chapter.
We are Wisconsin's voice for the nation's oldest, largest and most influential grassroots environmental organization. Our members include 18,000 of your friends and neighbors. Inspired by Wisconsin’s beautiful lakes, forests, rivers, and other natural features, we work together to protect our communities and the planet.
Looking to take action on the most pressing issues in Wisconsin?
Check out our Action Center!
Make a Difference for Wisconsin's Future!
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Local News and Information
Announcing: Thirsty Power: Coal and gas will leave us high and dry
July 30, 2026
A new report from the Sierra Club, Thirsty Power: Coal and gas will leave us high and dry analyzes Wisconsin’s current power generation, the water needed for that power, and the potential impacts on Wisconsin’s water as Big Tech tries to build more...
Dark Skies, Bright Future Program
July 24, 2026
From light pollution to warming night temperatures, the impact of the Sierra Club Wisconsin’s work stretches around the clock. Joins us online for a special online program July 29, as part of our Dark Skies, Bright Future fundraiser. We’ll take a...
Coexisting with Ecosystem Engineers
July 21, 2026
Wisconsinites have an opportunity to weigh in on the management of another beneficial keystone species in our state.