Mayors, Join Us.

SIGN ON OPPORTUNITY: Open Letter from Climate Mayors Standing United to Defend Against Trump Climate Rollbacks and Advance Climate Action at the Local Level

We invite you to join Climate Mayors to reaffirm your commitment to addressing one of the most urgent issues of our time, the climate crisis. If you are not already a member, by signing this letter you will be included in our coalition of hundreds of mayors who stand together to support collective action on climate change.

You can sign-on to the letter here or PDF of letter here.


Join the network that since 2014 has mobilized over 750 mayors across the country committed to leading on climate in their communities. Help build political will for federal and global climate action and learn best practices from fellow mayors.

There are no binding commitments for Climate Mayors members.

In addition, we ask members of the Climate Mayors network to join in occasional letters and statements, as well as substantive initiatives like our electric vehicle (EV) purchasing collaborative.

To indicate your city’s intention to join, please fill out the form below.

(Membership is open only to mayors of U.S. cities!)

*** By signing on, cities indicate that they are pursuing actions to achieve an emissions reduction target through:

  • Developing a community Greenhouse Gas (GHG) inventory

  • Setting near- and long-term targets to reduce emissions

  • Developing a Climate Action Plan aligned with the city’s targets.

Join our Business Council

Climate Mayors invites thought leaders and field experts to join Climate Mayors’ Business Council.