Until August 2013, Wairarapa College operated an
enrolment scheme to help curb roll numbers and prevent overcrowding. The school's home zone, in which students residing were automatically entitled to be enrolled without rejection, covered the western half of the Masterton township and the rural area to the northwest, west and southwest of the town, bounded by Mikimiki Road to the north,
State Highway 2 to the east, Wiltons Line in the south, and the
Tararua Ranges in the west. In September 2013, the enrolment scheme was removed, meaning any eligible student may enrol without rejection. At the October 2013
Education Review Office (ERO) review of the school, Wairarapa College had 942 students enrolled, including six
international students and 112 students living in College House. The school roll's gender composition was 54% male and 46% female, and its ethnic composition was 69%
New Zealand European (Pākehā), 22%
Māori, 3%
Asian, 2%
Samoan, and 4% Other. As of , Wairarapa College has an
Equity Index of , placing it amongst schools whose students have socioeconomic barriers to achievement (roughly equivalent to decile 4 under the former
socio-economic decile system). == Principals ==