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