Why Kappa Sigma? The Kappa Sigma Fraternity will better your college experience and opens the door for opportunities, unlike any other organization. We are the largest college fraternity in the world, and our network is scattered throughout North America. We have 305 active chapters and colonies, more than 17,000 undergraduate members, and at least 200,000 living alumni. We are a volunteer-driven organization, with each chapter having its own individual alumni support. Choosing Kappa Sigma is more than joining a fraternity; it is a life-changing decision that ultimately will better your life.