Botany Downs Secondary College is a state coeducational secondary school located in East Tamaki, a suburb of Auckland, New Zealand. The school opened in 2004 as a result of new residential development in the eastern Auckland area. Serving Years 9 to 13, the school has a roll of approximately 1,994 students.

Botany Downs Secondary College was announced with a notice published in the New Zealand Gazette by Education Minister Trevor Mallard on 12 November 2001, with the working name Howick South Secondary School. The school opened in January 2004, initially taking Year 9 students only. The remaining school years opened as the 2004 Year 9 students moved through, with the school fully opening at the beginning of 2008.

The Whanau system in Botany Downs Secondary College has a total of 6 houses. These houses include:

In the 2023 Census, 54.5% of students ethnically identified as Asian, and 35.5% as European/Pākehā. Other major ethnic groups include Pacific (8.2%), Māori (5.5%), Middle Eastern, Latin American, African (MELAA) (4.8%), and other (0.8%). International students were included but separated, with 4.3% of students having been affiliated with an international status. The roll data presented is based on roll returns from the Ministry of Education as of 1 July 2023, reporting over 1,734 students, including domestic students who are affiliated with a single or multiple ethnic groups and international students.

As of July 2026, Botany Downs Secondary College has a roll of 1,994 students, of which 77 (3.9%) identify as Māori.

As of 2026, the school has an Equity Index of 403, placing it amongst schools whose students have few socioeconomic barriers to achievement (roughly equivalent to deciles 8 and 9 under the former socio-economic decile system).