Like many secondary schools in Auckland, Takapuna Grammar School operates an
enrolment scheme to help curb roll numbers and prevent overcrowding. The school's enrolment zone, in which students residing are automatically entitled to be enrolled without rejection, covers the suburbs of Devonport, Narrow Neck, Bayswater, Belmont, Hauraki, Takapuna and parts of Milford. Students residing outside the zone are accepted as roll places allow per the enrolment scheme order of preference and secret ballot, with siblings of current students getting first preference. At the August 2011
Education Review Office (ERO) review of the school, Takapuna Grammar School had 1420 students, including 195 international students. Fifty-three percent of students were male and 47 percent were female. Sixty-five percent of students at the school identified as
New Zealand European (Pākehā), nine percent as British or Irish, five percent as
Māori, five percent as Korean, and three percent as Chinese. As of , Takapuna Grammar School has roll of students, of which (%) identify as Māori. As of , the school has an
Equity Index of , placing it amongst schools whose students have the socioeconomic barriers to achievement (roughly equivalent to deciles 9 and 10 under the former
socio-economic decile system). == Curriculum ==