In 2009 alone, over 1500 bills relating to immigration were considered by all 50 states, resulting in over 350 new laws and resolutions. Indeed, immigration policy, and particularly illegal immigration, is a salient topic for state and local policy makers and those who are responsible for implementing public policy. Arguably, this increased salience in immigration policy is driven by at least two factor; 1) a failure to comprehensively address immigration policy at a national level and 2) political and media attention on anecdotal claims regarding the deleterious costs illegal immigrants have society. With respect to education policy, since 2005, 74 immigration-related state laws have been enacted – with all but five coming since 2007. One particularly relevant question is to what extent undocumented students affect performance in public schools. This is a question where opinions abound, but empirical based conclusions are lacking. Using data from 2000-2005, we develop a unique measure of undocumented students and examine the relationship between undocumented students and a variety of performance indicators. We find little evidence to support the claim undocumented students are associated with poor overall student performance.