College students politically participate through traditional mechanisms at lower rates than their elders. Yet, members of this group may participate by other means, like friending candidates and joining political groups through social networking websites. We argue that these online activities serve as a meaningful form of civic engagement by broadening who participates and encouraging other forms of participation. Using a survey of randomly chosen undergraduates at a large Midwestern university, we discover that important distinctions exist between those who friend or join these online social networks and those who participate in more traditional off-line political activities. While interest in politics is a precursor to off-line engagement, it does not predict friending or joining an online social network that is political in nature. However, friending candidates or joining such networks appears to mobilize college students to engage in other forms of political participation.