U.S. Climate Action Network (USCAN) is an affiliate network of the Climate Action Network (CAN), a worldwide network of over 365 Non-Governmental Organizations (NGOs) from 85 countries working to promote government, private sector and individual action to limit human-induced climate change to ecologically sustainable levels. CAN's mission is to support and empower civil society organizations to influence the design and development of an effective global strategy to reduce greenhouse gas emissions and ensure its implementation at international, national and local levels in the promotion of equity and sustainable development.

USCAN was established in March 1989 to provide groups working on global warming with a forum for joint strategy development and advocacy to affect change in a coordinated way at the United Nations and in Washington, DC. USCAN has since expanded to include nearly 60 advocacy organizations from across the country, facilitating collaboration on common strategies at the state, regional, federal and internatonal levels. USCAN includes a broad cross-section of advocates, with members from environmental, faith, student, environmental justice and local government organizations. USCAN plays a critical role in connecting groups working at all levels to set common priorities and ensure coordinated constituency outreach, corporate engagement, policy advocacy, and media outreach.