This paper examines the extent and determinants of popular support for reservation policy for the Scheduled Castes and the Other Backward Classes in India, using an individual-level opinion survey data set. It argues that the reservation policy, as well as its longitudinal extension and expansion into the private sector, is more supported than opposed, even though public opinion is polarised regarding its expansion to the private sector. Aside from the control variable of reservation status, those who are highly educated, female, rich, caste conscious, or have inter-caste friendships are likely to support reservation, whereas upper castes are less likely to support it.