C40 Cities: When local action meets global ambition
Behind every climate solution is a community and a city that dared to lead.
Amsterdam
Quito
Wuhan
Nairobi
Ahmedabad
Zhenjiang
Jakarta
Dakar
Philadelphia
Tshwane
Los Angeles
Oslo
Medellín
Melbourne
Chicago
Fuzhou
Miami
Istanbul
Santiago
Phoenix
Guangzhou
Durban (eThekwini)
Lisbon
Beijing
Rotterdam
Buenos Aires
Shanghai
Hangzhou
Warsaw
Tel Aviv – Yafo
Casablanca
Kuala Lumpur
Stockholm
Amsterdam
Quito
Wuhan
Nairobi
Ahmedabad
Zhenjiang
Jakarta
Dakar
Philadelphia
Tshwane
Los Angeles
Oslo
Medellín
Melbourne
Chicago
Fuzhou
Miami
Istanbul
Santiago
Phoenix
Guangzhou
Durban (eThekwini)
Lisbon
Beijing
Rotterdam
Buenos Aires
Shanghai
Hangzhou
Warsaw
Tel Aviv – Yafo
Casablanca
Kuala Lumpur
Stockholm
Mumbai
Chengdu
Austin
Addis Ababa
Auckland
Rio de Janeiro
Singapore
Tokyo
Washington, DC
Dhaka (North & South)
Amman
San Francisco
Toronto
Quezon City
Salvador
Hanoi
Freetown
Yokohama
Madrid
Ekurhuleni
Dubai
Seattle
Seoul
Bengaluru
Cape Town
Boston
Shenzhen
Lima
Portland
Lagos
Houston
Vancouver
Dar es Salaam
Mumbai
Chengdu
Austin
Addis Ababa
Auckland
Rio de Janeiro
Singapore
Tokyo
Washington, DC
Dhaka (North & South)
Amman
San Francisco
Toronto
Quezon City
Salvador
Hanoi
Freetown
Yokohama
Madrid
Ekurhuleni
Dubai
Seattle
Seoul
Bengaluru
Cape Town
Boston
Shenzhen
Lima
Portland
Lagos
Houston
Vancouver
Dar es Salaam
Rome
São Paulo
Chennai
Paris
Karachi
Berlin
London
Bangkok
Hong Kong
Dalian
Heidelberg
New York City
Fortaleza
Bogotá
Mexico City
Accra
Johannesburg
Milan
Delhi NCT
Montréal
Guadalajara
Sydney
Qingdao
Abidjan
Ho Chi Minh City
Curitiba
Copenhagen
Athens
New Orleans
Barcelona
Nanjing
Rome
São Paulo
Chennai
Paris
Karachi
Berlin
London
Bangkok
Hong Kong
Dalian
Heidelberg
New York City
Fortaleza
Bogotá
Mexico City
Accra
Johannesburg
Milan
Delhi NCT
Montréal
Guadalajara
Sydney
Qingdao
Abidjan
Ho Chi Minh City
Curitiba
Copenhagen
Athens
New Orleans
Barcelona
Nanjing
C40 has
97
member cities
Making up more than
22%
of the global economy1
Accelerator Reports
Latest Reports Now Available
Since 2017, 74 forward-thinking C40 cities have been driving transformative action in critical sectors through C40’s High-Impact Accelerators.
In the latest Accelerator Reports, we celebrate the progress and impact of cities’ climate actions.
Latest News
June 24, 2025
Sources:
1. Oxford Economics data + C40 modelling and World Bank for global GDP.