Auckland Girls' Grammar School (AGGS) is a New Zealand secondary school for girls located in Newton, in the Auckland central business district. Established in 1878 as Auckland Girls' High School, it is one of the oldest secondary institutions in the country.^[3] The school closed its site temporarily in 1888 due to financial difficulties^[4] and classes for girls were held at Auckland Grammar School^[5] until the girls' school moved to new premises in Howe Street in 1909^[6] and the name of the school changed to Auckland Girls' Grammar School.^[7][8][9] The school received the Goodman Fielder awards for School and Secondary School of the year in 2000.^[10]

The main block is listed as a Category II Historic Place.^[11]

In 2018, Auckland Girls' Grammar School had 1,030 students enrolled and is 100% female. The number of international students was 22. The ethnic composition of the school was as follows: 23% Māori, 23% Samoan, 16% Tongan, 3% New Zealand European (Pākehā), 13% Asian, 6% Niuean, and 6% Indian.^[12]

• Frankie Adams – actress^[13]
• Zoë Bell – stuntwoman and actress^[14]
• Sue Bradford – politician, activist and former Green MP
• Dorothy Butler – author^[15]
• Sandra Coney – journalist and women's rights activist^[15]
• Kayla Cullen – athlete, Northern Mystics and NZ Silver Ferns^[15]
• Lana Coc-Kroft – NZ Miss Universe 1988, television presenter^[16]
• Emily Karaka – artist^[15]
• Golriz Ghahraman – politician and former Green MP, former United Nations lawyer^[15]
• Kiri Allan – politician and Labour MP, Minister of Conservation, Minister for Emergency Management
• Parris Goebel – international choreographer^[17]
• Katrina Grant – athlete, NZ Silver Ferns^[15]
• Siositina Hakeai – athlete^[18]
• Hon. Laila Harré – union leader, politician, former Alliance MP and Minister of Women's Affairs, Minister of Youth Affairs, Minister of Statistics, Associate Minister of Labour and Commerce
• Doreen Lumley – athlete^[19]
• Rose Matafeo – comedian, television presenter^[15]
• Miriama McDowell – New Zealand actress, director and playwright^[20]
• Ani O'Neill – artist^[15]
• Merimeri Penfold – Maori educator^[15]
• Sheryl Scanlan – netball player^[15]
• Miriama Smith – actress^[20]
• Pauline Stansfield – disability rights advocate
• Kahurangi Taylor – Miss New Zealand 2008
• Munokoa Tunupopo – athlete, Auckland and White Ferns
• Hon. Dame Georgina Manunui te Heuheu – politician, former National MP and Minister for Courts, Minister of Women's Affairs, Minister of Pacific Island Affairs, Minister for Disarmament and Arms Control, Associate Minister of Maori Affairs^[15]
• Poto Williams – politician and Labour MP, Assistant Speaker of the New Zealand House of Representatives^[15]
• Tammy Wilson – Black Ferns^[15]
• Katrina Rore – netballer
• Tiana Epati – First Pacifica President, and current President of the New Zealand Law Society

• Annie Whitelaw (1875–1966): 1906–1910^[21][7]
• Blanche Butler (died 1967): 1911–1921^[22]
• Rua Gardner (1901–1972): 1944–1967^[23]
• Louise Gardner (ca. 1916–2006): 1967–1978^[24]
• Charmaine Pountney: 1978–1988^[25]
• Ngaire Ashmore (born ca. 1967): 2017–present^[26][27]