College students living in university housing and student-specific complexes are counted as part of the Census Group Quarters Enumeration, which means one representative (e.g. the university) may register the count for the census.
From the census website:
-In general, students in colleges and universities temporarily closed due to the COVID-19 virus will still be counted as part of this process. Even if they are home on census day, April 1, they should be counted according to the residence criteria which states they should be counted where they live and sleep most of the time. We are asking schools to contact their students and remind them to respond.
-Per the Census Bureau’s residence criteria, in most cases students living away from home at school should be counted at school, even if they are temporarily elsewhere due to the COVID-19 pandemic.