John Wilhelm Rowntree (4 September 1868 – 9 March 1905) was a chocolate and confectionery manufacturer and Quaker religious activist and reformer.He was born on 4 September 1868 in York, the eldest son of Joseph Rowntree (1836–1925) and his second wife, Antoinette Seebohm (1846–1924).
He was educated at Bootham School, York and Oliver's Mount School, Scarborough.
He was a successful businessman, vastly expanding the already successful family chocolate business.
He played a large part in enabling the Religious Society of Friends to incorporate an understanding of modern science (such as the theory of evolution), modern biblical criticism, and the social meaning of Jesus's teaching into their belief systems.
He helped establish Woodbrooke, the Quaker study centre in Bournville, Birmingham.
He died on 9 March 1905 in New York.