Bloomberg Philanthropies is a philanthropic organization that encompasses all of the charitable giving of founder Michael R. Bloomberg. Headquartered in New York City, Bloomberg Philanthropies focuses its resources on five areas: the environment, public health, the arts, government innovation and education. According to the Foundation Center, Bloomberg Philanthropies was the 10th largest foundation in the United States in 2015, the last year for which data was available. Bloomberg has pledged to donate the majority of his wealth, currently estimated at more than $54 billion. Patti Harris is the CEO of Bloomberg Philanthropies.

While working at Bloomberg L.P., Bloomberg donated much of his wealth to medical research, education and the arts. He also sat on the boards of numerous charitable organizations. Beginning in 2004, Bloomberg appeared on Chronicle of Philanthropy’s list of top 50 Americans who had donated the most money that year. Between 2004 and 2011, Bloomberg was listed as a top 10 American philanthropist each year.

For two consecutive years, in 2023 and 2024, Bloomberg was listed as having given to the most charitable causes; in 2024, he distributed $3.7 billion through the Bloomberg Philanthropies to various organizations, schools, and initiatives.

Since 2006, the headquarters has been located at Stuyvesant Fish House on East 78th Street in Manhattan.

Bloomberg Philanthropies directs its resources to five issue areas: the environment, public health, the arts, government innovation and education.

Bloomberg Philanthropies has focused on combating climate change and moving toward clean energy sources. In 2011, the foundation partnered with the Sierra Club’s Beyond Coal campaign by donating $50 million toward shutting down coal-fired power plants. On April 8, 2015, Bloomberg Philanthropies increased its support of the Beyond Coal campaign with a $30 million pledge, in order to accelerate the goal of closing and replacing half of all U.S. coal power plants with clean energy by 2017. Beyond Coal expanded into Europe in summer 2017 with a goal of phasing out the use of coal on the continent by 2030. The campaign marked the closure of the last coal-burning power plant in Austria in 2020. 2020 also saw the expansion of Beyond Coal into Asia including the launch in of Korea Beyond Coal in September of that year. In September 2023, Michael Bloomberg announced that Bloomberg Philanthropies would commit an additional $500 million to Beyond Carbon to 'finish the job on coal."

Building on the momentum of the Beyond Coal work, Bloomberg Philanthropies launched Beyond Carbon, taking aim at natural gas and combustion-driven cars. In September 2022, launched Beyond Petrochemicals, a campaign to halt permits for and construction of plastics and petrochemical plants. The campaign supports efforts already underway by local communities in Louisiana, Texas and Appalachia. Bloomberg Philanthropies pledged $85 million to the efforts and is focused on blocking construction of more than 120 planned petrochemical plants.

Bloomberg Philanthropies partnered with RadicalMedia to produce the 2017 documentary "From the Ashes." the film was distributed by National Geographic and debuted at the 2017 Tribeca Film Festival. The film appeared in theaters and aired on National Geographic in summer 2017. In conjunction with the film, Bloomberg Philanthropies announced a new commitment and crowdfunding campaign to support "entities backing economic development in communities that are historically dependent on the coal industry, and have suffered as plants have closed." In 2018, Bloomberg Philanthropies again partnered with National Geographic and Radical Media for a follow-up documentary, “From Paris to Pittsburgh.” The film examined the social and economic impacts of climate change-fueled natural disasters, from the heartland to the nation's coastlines.