In what ways do online groups help to foster political engagement among citizens? We employ a multi-method design incorporating content analysis of online political group pages and original survey research of university undergraduates (n = 455) to assess the relationship between online political group membership and political engagement—measured through political knowledge and political participation surrounding the 2008 election. We find that participation in online political groups is strongly correlated with offline political participation, as a potential function of engaging members online. However, we fail to confirm that there is a corresponding positive relationship between participation in online political groups and political knowledge, likely due to low quality online group discussion.