Russell Wendell Simmons (born October 4, 1957 in Queens, New York), is an American entrepreneur, the co-founder, with Rick Rubin, of the pioneering hip-hop label Def Jam, founder of another label, Russell Simmons Music Group, and creator of the clothing fashion line Phat Farm.

Russell Simmons is the younger brother of Daniel Simmons, Jr and he is the older brother of Rev. Joseph Simmons, better known as "Run" of Run-DMC, and son of Daniel Simmons, Sr, a public school administrator and Evelyn Simmons, a New York City park administrator. His brother Daniel Simmons, Jr is an accomplished abstract artist.

Russell Simmons has been vegan since 1998, and advocates the adoption of veganism citing animal rights along with the environmental and health benefits.