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