Orenstein

There are several notable people with the surname Orenstein.
 * Alexander Jeremiah Orenstein, South African medical scientist and army general
 * Henry Orenstein, American poker player and entrepreneur
 * Henry Orenstein (painter), Canadian artist
 * Howard Orenstein, American lawyer and politician
 * Joan Orenstein, Canadian actress
 * Leo Orenstein, Canadian television producer and director
 * Peggy Orenstein, American writer
 * Toby Orenstein, an American theatrical director, producer, and educator
 * Walter Orenstein, American vaccinologist
 * Zigu Ornea (born Orenstein or Ornstein), Romanian cultural historian