Mayors Challenge winners through time

January 18, 2022

The Bloomberg Philanthropies Mayors Challenge is an ideas competition for cities to create the biggest and boldest solutions to their toughest problems. Winning cities receive $1 million to put their breakthrough idea into action, as well as expert coaching to support implementation. Explore this map to learn more about each of the Mayors Challenge winning cities—and their winning ideas—since the competition’s start in 2013.