C40 Cities: When local action meets global ambition
Behind every climate solution is a community and a city that dared to lead.
Bengaluru
Vancouver
Dalian
Zhenjiang
Karachi
Salvador
Melbourne
Seoul
São Paulo
Phoenix
Nanjing
Wuhan
Cape Town
Houston
Amsterdam
Freetown
Quezon City
Casablanca
New Orleans
Lima
Istanbul
Philadelphia
Kuala Lumpur
Tshwane
Portland
Buenos Aires
Guadalajara
Dhaka (North & South)
Sydney
Hong Kong
San Francisco
Accra
Delhi NCT
Bengaluru
Vancouver
Dalian
Zhenjiang
Karachi
Salvador
Melbourne
Seoul
São Paulo
Phoenix
Nanjing
Wuhan
Cape Town
Houston
Amsterdam
Freetown
Quezon City
Casablanca
New Orleans
Lima
Istanbul
Philadelphia
Kuala Lumpur
Tshwane
Portland
Buenos Aires
Guadalajara
Dhaka (North & South)
Sydney
Hong Kong
San Francisco
Accra
Delhi NCT
Guangzhou
Addis Ababa
Dubai
Milan
Bogotá
London
Fortaleza
Chengdu
Stockholm
Rio de Janeiro
Seattle
Oslo
Barcelona
Mexico City
Ho Chi Minh City
Hangzhou
Medellín
Chicago
Heidelberg
Athens
Los Angeles
Lagos
Miami
Johannesburg
Quito
Madrid
Auckland
Mumbai
Tel Aviv – Yafo
Montréal
Curitiba
Shenzhen
Copenhagen
Guangzhou
Addis Ababa
Dubai
Milan
Bogotá
London
Fortaleza
Chengdu
Stockholm
Rio de Janeiro
Seattle
Oslo
Barcelona
Mexico City
Ho Chi Minh City
Hangzhou
Medellín
Chicago
Heidelberg
Athens
Los Angeles
Lagos
Miami
Johannesburg
Quito
Madrid
Auckland
Mumbai
Tel Aviv – Yafo
Montréal
Curitiba
Shenzhen
Copenhagen
Amman
Berlin
Hanoi
Austin
Jakarta
Paris
Toronto
Bangkok
Dakar
Santiago
Durban (eThekwini)
Nairobi
Lisbon
Washington, DC
Yokohama
Shanghai
New York City
Abidjan
Tokyo
Ahmedabad
Rotterdam
Ekurhuleni
Warsaw
Boston
Singapore
Beijing
Qingdao
Rome
Fuzhou
Dar es Salaam
Chennai
Amman
Berlin
Hanoi
Austin
Jakarta
Paris
Toronto
Bangkok
Dakar
Santiago
Durban (eThekwini)
Nairobi
Lisbon
Washington, DC
Yokohama
Shanghai
New York City
Abidjan
Tokyo
Ahmedabad
Rotterdam
Ekurhuleni
Warsaw
Boston
Singapore
Beijing
Qingdao
Rome
Fuzhou
Dar es Salaam
Chennai
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.