National Panhellenic Conference. National Panhellenic Conference, founded in 1902, in an umbrella organization for 26 international women's fraternities and sororities. Each member group is autonomous as a social, Greek-letter society of college women and alumnae. Members are represented on over 620 college and university campuses in the United States and Canada and in over 5,300 alumnae associations, making up a population of over 3 million sorority women in the world. The mission of the NPC is to support and promote women's fraternities as a positive element of the higher education experience."