This paper examines state policies that extend or deny in‐state tuition to children of undocumented immigrants in the United States. Using the Current Population Survey (1997–2010), we assess changes in college enrollment among Mexican‐born non‐citizens — a proxy for the undocumented population. In contrast to previous analyses, we find that policies extending in‐state tuition to undocumented youth do not directly affect rates of college enrollment. However, we find that Mexican‐born non‐citizen youth residing in states that deny in‐state tuition have a 12.1 percentage point lower probability of being enrolled in college than their peers living in states with no such policies.