Melvin Alan "Mel" Karmazin (born August 24, 1943) is an American executive. He co-founded and was the president of Infinity Broadcasting and eventually became the president and chief executive officer of CBS. As of 2008, he is the CEO of Sirius XM Radio.

Born in Manhattan, New York, Karmazin was selling radio ads at the age of 17. He graduated from Pace University with a bachelor's degree in business administration and worked his way up from the bottom rungs of the radio ladder in New York City.

Karmazin presided over New York's WNEW-AM and WNEW for Metromedia when he was approached to run Infinity Broadcasting in 1981. Soon after he would add fellow New York stations WKTU-FM and WFAN into Infinity's stable. WFAN morning talent Don Imus often referred to Karmazin on the air, never by name, but by the nickname "The Zen Master".