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