Dorothy Isabel Knox OBE AM (27 August 1902 – 7 November 1983) was an Australian headmistress.

She went on to stay at Janet Clarke Hall and attend under-grad and post-graduate studies at Melbourne University.

The previous head was Grace Mackintosh[2] who had been the unsuccessful replacement for Nancy Jobson who had expanded the college.

[4] Know guided community appeals for suitable accommodation for ladies attending university.

[5] The new college was established in 1972 and named after John Dunmore Lang,[5] the first Presbyterian clergyman in Sydney.