The Mega-Cities Project is a worldwide non-profit organization dedicated to shortening the lag time between ideas and implementation by sharing innovative solutions to the problems cities face in common.
Header photo (Democratization and Decentralization) from Catalytic Communities
What is a mega-city?
A mega-city has a population of 10 million or more.
According to the “Report on The World’s Cities” (2016) by the Economic and Social Affairs Office of the United Nations, there are currently 31 mega-cities, but definitions of cities and metropolitan areas are inconsistent across countries and sources.

We work in 23 of the largest cities in the world:

Latest News
BRAVO YVES CABANNES!!
Yves was a magical person—he was a bright light. Whether in civil society, academia, or the UN system, he was always thinking of a new way to “walk the talk”. At every urban meeting or city summit, Yves would cut to the heart of the conversation, suggesting a way forward that seemed perfectly obvious, but no one had seen.
Listen To Janice Perlman on the Caos Planejado Podcast
Listen To Janice Perlman on the Caos Planejado Podcast
Grassroots Innovation, Global Impact: Mega-Cities Project’s 2024 Journey
The Mega-Cities Project (MCP) marked a year of groundbreaking research, global advocacy, and grassroots innovation in 2024. From advancing the Life Cycle of Urban Innovations study to influencing discussions at the World Urban Forum and Smart Cities Conference, MCP continues to champion people-centered urban solutions.
My honor to work with Jimmy Carter on the first National Urban Policy
Amid the worldwide outpouring of admiration and affection for Jimmy Carter, I I feel a deep sense of exhilaration and personal pride that I was fortunate enough to work for him on the first ever “National Urban Policy.”