JLSC is an organization of women committed to promoting volunteerism, developing the potential of women and improving the community through the effective action and leadership of trained volunteers. Its purpose is exclusively educational and charitable. The Junior League of Sioux City reaches out to women of all races, religions and national origins who demonstrate an interest in and commitment to voluntarism. The organization is a member of the Association of Junior Leagues International, which is comprised of over 300 Leagues and 200,000 members.