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
Legal Settlement Secured by MEA and Sierra Club Leads to Statewide Environmental Review of Data Center Development in Wisconsin
October 19, 2026
A legal settlement secured by Midwest Environmental Advocates (MEA) on behalf of Sierra Club requires the Wisconsin Department of Natural Resources (DNR) to conduct a comprehensive statewide review of the environmental impacts of data center...
Sierra Club Wisconsin: PSC Greenlights Health Issues and Pollution with Construction Approval of New Gas Plants to Power Data Centers
October 15, 2026
Today, the Wisconsin Public Service Commission (PSC) took the first step to approve construction permits for the Red Oak Ridge Energy Center, a 1.1 GW gas power plant in Kenosha County, and the Foundry Ridge Energy Center, a 324 MW gas plant in...
Response to Price County Wolf Pack Incident
October 12, 2026
Earlier this fall, the Wisconsin Department of Natural Resources (DNR) authorized the killing of 9 Price County wolves, eliminating almost an entire pack or family unit. Join us in calling on the DNR to establish new criteria so something like this...