NPC Seal The National Panhellenic Conference , or NPC, is an umbrella organization for 26 international and national women's fraternities and sororities. According to the National Panhellenic Conference Web site, there are Panhellenic chapters on more than 620 college campuses in the United States and Canada.

The National Panhellenic Conference cites five main reasons for the existence of sororities:

While the sororities of the National Panhellenic Conference were not formed for specifically professional or service-oriented purposes, social is only one of many functions and values of a sorority, as seen in the creed of the National Panhellenic Conference member sororities, posted on the NPC Web site:

“We, as Undergraduate Members of women's fraternities, stand for good scholarship , for guarding of good health, for maintenance of fine standards , and for serving, to the best of our ability, our college community. Cooperation for furthering fraternity life, in harmony with its best possibilities, is the ideal that shall guide our fraternity activities. We, as Fraternity Women, stand for service through the development of character inspired by the close contact and deep friendship of individual fraternity and Panhellenic life. The opportunity for wide and wise human service , through mutual respect and helpfulness, is the tenet by which we strive to live.”