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