Long Island is one of the most densely populated regions in the United States. As of the United States 2016 Census, the combined population of Nassau and Suffolk counties was 2,854,083 people.
Stony Brook University Hospital is one of the largest hospitals on Long Island. The hospital has received multiple awards over the years. It has 603 beds, and in 2016 treated 31,715 inpatients and 940,404 outpatient visits, in addition to over 108,000 emergency room visits.