Philip K. Eichner, S.M., was an American educator, Marianist priest and Catholic activist. He chaired the Board of Directors of the Catholic League for Religious and Civil Rights from 1992 to 2016, and he has been president of three Catholic schools on Long Island. Eichner was a successful respondent in , a case before the New York Court of Appeals which helped to establish the rights of patients and their proxies to decline extraordinary means of life support.