Mark Epstein

Mark Epstein is an American real estate developer based in New York City and the younger brother of Jeffrey Epstein. Mark managed several properties connected to Jeffrey, including apartments in a building on East 66th Street in Manhattan that were linked to Jeffrey's network. He testified in a 2009 civil deposition that models from MC2 (Jean-Luc Brunel's agency, funded by Jeffrey) stayed in apartments he managed. Mark has maintained that he was unaware of his brother's criminal activities. He cooperated with some legal proceedings but has been criticized for the degree of his involvement in managing properties where abuse allegedly occurred.

Grew up in Coney Island, Brooklyn alongside his older brother Jeffrey. Entered the real estate business in New York City.

Mark managed the building at 301 East 66th Street in Manhattan where models from MC2 Model Management stayed. In depositions, he described visiting Jeffrey's Palm Beach home but denied awareness of underage girls. He was named as executor of his brother's will.

Younger brother of Jeffrey Epstein. Son of Seymour and Pauline Epstein. Never married publicly.