For low-income students who received financial aid, federal aid (including grants and loans) constituted from 46 to 73 percent of total aid, on average, depending on the type of institution attended. For aided middle-income students, it ranged from 30 to 61 percent. The relative contribution of state grants to total aid was also higher, on average, for low-income students than for middle-income students except at public 2-year institutions, where no difference was detected. At each type of institution, institutional aid made up a greater proportion of total aid, on average, for middle-income students than for low-income students.