|Ringwood East, Victoria
|Motto||Latin: Factis Non Verbis
(By deeds not words)
|Colour(s)||Green, Navy and White
Established in 1877 by Emma Bartlet Cook, Tintern has a non-selective enrolment policy and currently caters for over 890 students, from ELC through to Year 12, including international students.
Located on one site in Ringwood East, the Early Learning Centre is co-educational, whilst girls and boys are educated in single-sex environments from Prep - Year 9. In Years 10 - 12 boys and girls learn together in a co-educational classes.
The school is a member of the Eastern Independent Schools of Melbourne (EISM), the Junior School Heads Association of Australia (JSHAA), the Association of Heads of Independent Schools of Australia (AHISA), and the Alliance of Girls' Schools Australasia (AGSA).
Tintern was founded in 1877 by Emma Cook. Not satisfied with any of the established schools in Hawthorn, Cook felt she needed to start "an excellent school" for her four youngest daughters and the youngest of her five sons. It was not long before neighbours asked Cook to allow their children to enrol, and as word spread about the achievements of the school, many country families also sent their children to attend.
The Church of England Trust purchased the school in 1918, and what was initially a co-educational school, became a school for girls. Continued growth meant to the need for larger and more modern facilities, and subsequently the school moved to its current campus of just over 50 acres (20 ha), at Ringwood East in 1953. This site had been purchased in June 1946 for £3,113.
In 1999, under the principalship of Sylvia Walton (1982–2005), the School returned to Cook's founding wish of educating the whole family, with the establishment of Tintern's brother school, Southwood, located at Ringwood.
Tintern Grammar is set on a 20 hectares (49 acres) campus in a semi-rural setting, featuring bushland and landscaped gardens. The schools facilities include a multi-function assembly and performance space, ELC, senior and junior libraries and information centres, science and technology laboratories, computer laboratories, established areas for visual and performing arts, a swimming pool and gymnasium complex and other sporting facilities.
The school also features a farm, where students are encouraged to take part in a Young Farmers program, in which they enter in agricultural competitions. The farm has been operational since the opening of the Ringwood campus of the school, and has since been very successful in local sheep competitions.
Tintern has a house system adopted in 1924 and modelled on great English Public Schools. The houses are Cross (after Agnes Cross, Headmistress 1911–1918), Gordon (after three former head prefects, all sisters), Mansfield (after founder and first principal Emma Cook, whose maiden name was Mansfield), Somner (after three sisters, two of whom were staff members) and Watt, after ex-student and Olympic Gold medal winning cyclist Kathy Watt.
Alumnae of Tintern Grammar are known as 'Old Girls' or 'Old Boys' and automatically become members of the schools alumni association, the Tintern Old Girls Association (TOGA) or the Southwood Old Boys Association (SOBA). Some notable past students include:
- Jo Bailey – Sale of the Century co-presenter and wife of Stephen Silvagni
- Judy Maddigan – Member for the seat of Essendon representing the ALP
- Hilary McPhee – Vice-chancellor's fellow University of Melbourne and former publisher 
- Kathy Watt – Gold medallist at the 1992 Barcelona Olympics in the Road Race
- Fifi Box – Radio broadcaster and TV personality
- Kimberley Chen – Taiwanese celebrity, singer and model
- Helen Reddy – Singer-songwriter and actress
- Penelope Thwaites – Concert pianist and composer
- Thomas Lacey – Australian Actor
- Helen Quinn – Australian-American theoretical physicist and educator, an Honorary Officer of the Order of Australia. (Her name was Helen Arnold when she graduated from Tintern Church of England Girls' Grammar School in 1959.)
- "130 years of Excellence". Girls Grammar - Tintern. Tintern Schools. 2007. Archived from the original on 2007-08-30. Retrieved 2007-10-04.
- "JSHAA Victorian Directory of Members". Victoria Branch. Junior School Heads' Association of Australia. 2007. Retrieved 2008-01-15.
- "Victoria". School Directory. Association of Heads of Independent Schools of Australia. 2008. Archived from the original on 2008-03-07. Retrieved 2008-02-01.
- Butler, Jan (2006). "Member Schools". Members. The Alliance of Girls' Schools Australasia. Retrieved 2008-01-15.
- Factis (PDF) (3). Melbourne, Vic.: Tintern Schools. 2007 http://www.tintern.vic.edu.au/__data/assets/pdf_file/0009/1314/TINFN23087_3_LR.pdf. Retrieved 2007-10-04. Missing or empty
- Tintern Schools Campus Facilities (accessed:14-08-2007)
- Tintern Girls Grammar School: The House System (accessed:14-08-2007)
- "Old Grammarians". Our Community. Tintern Schools. 2007. Retrieved 2007-10-04.
- Green, Jonathan (2005-03-30). "Famous alumni on Latham's hit list". Politics. Crikey. Retrieved 2007-08-06.
- Helen R. Quinn. CWP, UCLA, and UC Regents. 1995 - 1998.