Wisconsin Chapter

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.

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Looking to take action on our priority issues? 

⬅️ Check out our Action Center!

Make a Difference for Wisconsin's Future!

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The Sierra Club created this toolkit to help Wisconsinites understand what hyperscale data centers are, what impacts they have, and what local communities and concerned citizens can do to mitigate the worst impacts.
 

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Explore the newly released online dashboard that will connect you to the wildlife and landscapes in Wisconsin! sc.org/widashboard 

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Donate today to keep Sierra Club's essential advocacy moving forward!

Click here to donate 

 

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WE DID IT  🐟 - 86,262 Fish!
Thanks to the creativity and dedication of people around the world, we've broken the record for the largest display of origami fish — over 86,000! Each fish is a symbol of shared commitment to protect the Great Lakes.

Photo credit: Devon Young Cupery

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Volunteer with the Sierra Club and make a difference today! Check out our volunteer page to learn more! 

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Donate your car, truck, cycle, RV or boat to the Sierra Club Foundation and select Wisconsin Chapter to benefit from your gift.

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Local News and Information

Go Fish! But first, Check Your Tackle Box

April 29, 2026
Throughout Wisconsin, locals and visitors are gearing up to enjoy the start of fishing season, which opens on May 2. Whether you’re a dedicated angler or a dabbler, a coalition of conservation and environmental advocacy groups encourage you to do a...
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