Browse relevant climate organizations to see where you might start your activist journey. If you’d like to suggest an addition or edit to this list send an email to
Some info and images sourced from Climatescape where a more detailed list that also includes climate capital resources can be found.

org logo

350 is building a future that’s just, prosperous, equitable and safe from the effects of the climate crisis.
We’re an international movement of ordinary people working to end the age of fossil fuels and build a world of community-led renewable energy for all. Here’s how we get there:
1. A fast & just transition to 100% renewable energy for all
2. No new fossil fuel projects anywhere
3. Not a penny more for dirty energy
Focus: Global grassroots movement
Employees: 51-200
HQ: Brooklyn, New York, United States
org logo Citizens' Climate Lobby

Citizens’ Climate Lobby

Citizens’ Climate Lobby is a non-profit, nonpartisan, grassroots advocacy organization focused on national policies to address climate change.
Our consistently respectful, nonpartisan approach to climate education is designed to create a broad, sustainable foundation for climate action across all geographic regions and political inclinations. By building upon shared values rather than partisan divides, and empowering our supporters to work in keeping with the concerns of their local communities, we work towards the adoption of fair, effective, and sustainable climate change solutions.
Focus: USA policy
Employees: 11-50
HQ: Coronado, California, USA
org logo Climate Reality

Climate Reality

Urgent action to cut greenhouse gas emissions and speed the global shift to renewables. Urgent action to halt the Trump Administration’s radical fossil fuel agenda. Urgent action to make world leaders strengthen and honor their Paris Agreement commitments.
Led by former US Vice President Al Gore and CEO and President Ken Berlin, we do it by empowering everyday people to become activists, equipped with the tools, training, and network to fight for solutions and drive change planet-wide.
The result is over 20,000 Climate Reality Leaders mobilizing communities in over 150 countries. Branches in 10 critical nations and regions around the Earth. 100 activists chapters (and growing) pushing for practical clean energy policies across the US.
Focus: Education and advocacy
Employees: 11-50
HQ: Washington, DC
org logo Environmental Defense Fund

Environmental Defense Fund

Environmental Defense Fund or EDF is a United States-based nonprofit environmental advocacy group. The group is known for its work on issues including global warming, ecosystem restoration, oceans, and human health, and advocates using sound science, economics and law to find environmental solutions that work. It is nonpartisan, and its work often advocates market-based solutions to environmental problems.
Focus: Environmental advocacy
Employees: 501-1000
HQ: Washington, District of Columbia, United States
org logo Extinction Rebellion

Extinction Rebellion

Extinction Rebellion (XR) is an activist-led global network of non-violent civil disobedience, creativity and regenerative culture, operating to address the climate and ecological emergency. Through our innovative, groundbreaking climate activism, we aim to awaken society to the scale of the emergency and demand governments and other institutions take the bold action necessary to avert it.
Focus: Global environmental movement
Employees: 51-200
HQ: Unknown
org logo Greenpeace


Greenpeace is a global, independent campaigning organization that uses peaceful protest and creative communication to expose global environmental problems and promote solutions that are essential to a green and peaceful future. Our investigations expose environmental crimes and the people, companies and governments that need to be held responsible. We bring together diverse perspectives, communities and individuals. Working together, we stop the destruction of the environment using peaceful direct action and creative communication.
Focus: Non-governmental environmental organization
Employees: 1,001-5,000
HQ: Amsterdam, Netherlands
org logo Our Climate

Our Climate

Our Climate empowers young leaders to advocate for equitable and science-based climate policy. Since 2014, we have trained and mobilized hundreds of young people across the country to advance state-level policies that sharply reduce emissions and ensure a just transition to clean energy. Our leaders contribute to state campaigns by creatively organizing their communities, sharing their stories with wide-reaching media outlets, and connecting with decision-makers.
Since our national campaign launched in 2016, Our Climate has empowered hundreds of students through our leadership development programs, contributed to state climate policy campaigns, and built support for holding polluters accountable.
Focus: Nonprofit – Civic & Social Organization
Employees: 2-10
HQ: Seattle, Washington, United States
org logo Rocky Mountain Institute

Rocky Mountain Institute

At Rocky Mountain Institute, we advance market-based solutions that transform global energy use. We engage businesses, communities, and institutions to cost-effectively shift to efficiency and renewables, creating a clean, prosperous and secure energy future. Our whole-systems expertise unlocks market based solutions that can be replicated and implemented now. As an independent, non-partisan nonprofit, we convene and collaborate with diverse partners – business, government, academic, nonprofit, philanthropic and military- to accelerate and scale solutions. We boldly tackle the toughest long-term problems – challenges often ignored by those held to short term results. We have been a leader in energy efficiency and renewables for more than 30 years.
Focus: Research, publication, consulting, and lecturing
Employees: 201-500
HQ: Snowmass, Colorado, United States
org logo Sierra Club

Sierra Club

The Sierra Club is America’s largest and most influential grassroots environmental organization. Inspired by nature, we are 1.3 million of your friends and neighbors, working together to protect our communities and the planet.
Comprised of over 500 employees and many more volunteers and members, Sierra Club works on various local and national environmental issues. Our careers range from conservation and lobbying work to planning our outings programs to the financial and technological positions that keep our company functioning.
Focus: Grassroots environmental organization
Employees: 501-1,000
HQ: San Francisco, California, United States
org logo Sunrise Movement

Sunrise Movement

Sunrise is a movement to stop climate change and create millions of good jobs in the process.
We’re building an army of young people to make climate change an urgent priority across America, end the corrupting influence of fossil fuel executives on our politics, and elect leaders who stand up for the health and wellbeing of all people.
We are ordinary young people who are scared about what the climate crisis means for the people and places we love. We are gathering in classrooms, living rooms, and worship halls across the country. Everyone has a role to play. Public opinion is already with us – if we unite by the millions we can turn this into political power and reclaim our democracy.
We are not looking to the right or left. We look forward. Together, we will change this country and this world, sure as the sun rises each morning.
Focus: Youth-led political movement
Employees: 51-200
HQ: Washington, DC
org logo The Climate Mobilization

The Climate Mobilization

A community and network of organizers, researchers, volunteers, and policymakers spanning the U.S. and extending internationally. We leverage organizing technologies and work on the ground with concerned individuals, communities, organizations, and governments to initiate a massive, economy- and society-wide Climate Mobilization to restore a safe climate.
Focus: Grassroots environmental organization
Employees: 11-50
HQ: Brooklyn, NY
org logo U.S. Youth Climate Strike

U.S. Youth Climate Strike

US Youth Climate Strike was founded on the principle that EVERYONE deserves a safe and livable future, regardless of who they are. We are strong grassroots movement fighting for fundamental change. We reject the notion that capitalism is the means to our survival and we encourage a creative reinvention of our future. A future free from Big Oil. A future where we end the cycle of US imperialism, and where justice is not an empty promise. With over 600 active organizers, we are a movement of young people ready to take the fight to streets and meet the opposition head on. Join our MOVEMENT.
Focus: Political Organization
Employees: 201-500
HQ: United Stated of America
org logo Union of Concerned Scientists

Union of Concerned Scientists

At the Union of Concerned Scientists, we put rigorous science to work to build a healthier planet and a safer world. Our scientists and engineers develop and implement innovative, practical solutions to some of our planet’s most pressing problems—from combating global warming and developing sustainable ways to feed, power, and transport ourselves, to fighting misinformation, advancing racial equity, and reducing the threat of nuclear war.
Focus: Science and advocacy
Employees: 51-200
HQ: Cambridge, Massachusetts, United States
org logo World Wide Fund for Nature

World Wide Fund for Nature

WWF’s mission is to stop the degradation of our planet’s natural environment, and build a future in which humans live in harmony with nature. To achieve this, we work with our many partners to save biodiversity, and reduce humanity’s impact on natural habitats. We strategically focus on conserving critical places and critical species that are particularly important for their habitat or for people.
Focus: International non-governmental organization
Employees: 1,001-5,000
HQ: Gland, Switzerland