Jules Porgès (25 May 1839 – 20 September 1921) was a Paris-based financier who played a central role in the rise of the Randlords who controlled the diamond and gold mining industries in South Africa.

He settled in Paris in the early 1860s and established himself as a diamond trader, through his company Jules Porgès & Cie.

He arrived in Kimberley himself in 1876 and continued their work in consolidating claims, financing deals and marketing stones, so that his firm Compagnie Française de Diamant du Cap de Bonne Espérance gained a significant portion of the Kimberley mine.

He was also instrumental in the negotiations that led to Rhodes buying the Kimberley Central Mining Company (the stake of Barney Barnato).

He built a large château at Rochefort-en-Yvelines just outside Paris for his wife known as the Château Porgès de Rochefort-en-Yvelines [fr], and daughter and maintained a 1892 built Paris townhouse on the Avenue Montaigne (14-18 avenue Montaigne), where he housed his important art collection.