The people in my cohort live in many different places. We have a few students who live at home in CT and commute in and we have others that live an hour away with their partner and they chose a place halfway between where their partner goes to work and YSN. There are a few who live closer to the YSN campus and others that live in Westville which is west of Old Campus near the Yale Bowl and athletic fields.
But the majority of students tend to live around old campus. The popular places are Wooster Square, Downtown, East Rock, and Science Hill/Prospect Hill. There are a few people that live near the medical school downtown as well.