The school operates an enrolment scheme to prevent overcrowding. Its boundaries incorporate parts of Hamilton East, Hillcrest and Silverdale and a rural zone including Tamahere, Tauwhare, Newstead and Matangi.
Hillcrest High is in close proximity to the University and School of Education. Its main contributing intermediates are Berkley and Peachgrove. The student population of Hillcrest High reflects the increasing multi-cultural structure of New Zealand Society, representing 28 different nationality groups. These consist of 68% Pakeha/European, 15% Asian, 12% Maori and 5% other nationality groups. The school roll is divided equally (50% female and 50% male).