Timbertop is an Australian boarding and co-educational campus of Geelong Grammar School located near Mansfield, Victoria. It is named after Mount Timbertop which towers directly over the campus.
Timbertop was established in 1953 by then headmaster James Darling, The campus is attended by year-nine students attending Geelong Grammar School, although as there are limited spaces not all students are able to attend. As of 2017 approximately 240 boys and girls attend Timbertop. They are divided into single-sex "units" of approximately 15 students. They participate in a wide variety of physical activities including running, hiking and skiing, as well as a normal academic routine. Additionally, students at Timbertop do not have access to devices such as computers, mobile phones or digital cameras and external news is typically received via newspaper or radio. Almost all communication from students to family and friends off campus is carried through hand-written letters. In order for students to receive hot water for showers, cleaning and heating, they must chop their own wood which is then placed in a boiler accompanying each unit building.