John Davison Rockefeller Jr. (January 29, 1874 May 11, 1960) was an American financier and philanthropist, and the only son of Standard Oil co-founder John D. Rockefeller.

He was involved in the development of the vast office complex in Midtown Manhattan known as Rockefeller Center, making him one of the largest real estate holders in the city. Towards the end of his life, he was famous for his philanthropy, donating over $500 million to a wide variety of different causes, notably in educational establishments. Among his more notable projects was the reconstruction of Colonial Williamsburg in Virginia. He was widely blamed for having orchestrated the Ludlow Massacre and other offenses during the Colorado Coalfield War.Rockefeller was the father of six children: Abby, John III, Nelson, Laurance, Winthrop, and David.

The Rockefeller Foundation is an American private foundation based at 420 Fifth Avenue, New York City. It was established by the Rockefeller family in New York State on May 14, 1913, when its charter was formally accepted by the New York State Legislature. The foundation was started by Standard Oil co-founder John D. Rockefeller ("Senior"), along with his son John D. Rockefeller Jr. ("Junior"), and Senior's principal business and philanthropic advisor, Frederick Taylor Gates.

As of 2015, the foundation was ranked as the 39th largest U.S. foundation by total giving. By the end of 2016, assets were tallied at $4.1 billion (unchanged from 2015), with annual grants of $173 million.According to the OECD, the foundation provided US$103.8 million for development in 2019.