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?
Make a Difference for Wisconsin's Future!
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Local News and Information
Line 5 Oil Pipeline Threatens Wisconsin: This is What it Looks Like
June 12, 2026
The Line 5 Pipeline transports oil across Wisconsin and Michigan into Canada. It has spilled over one million gallons of oil and is being operated well beyond its intended lifespan. Line 5 runs through the Bad River Reservation, and when...
Big Tech's Push To Weaken Data Center Protections Would Mean Bigger Bills For Wisconsinites
June 11, 2026
"The public has made it abundantly clear: there should be no discounts for data centers. In requesting a rehearing, We Energies is putting data centers over all other customers. There is no reason that residents should bear the financial risk of...
ICYMI: Committee Republicans Vote to Sell Off and Sell Out Our Public Lands, Including the Chequamegon-Nicolet National Forest
June 10, 2026
“Our forests aren’t for sale, plain and simple. But Republicans are relentlessly trying to sell them off to the highest bidder, putting our wildlife and lands at risk for generations. This isn’t what Wisconsinites want or what our ecosystems need....