Alethea Mary Proctor (2 October 1879 – 29 July 1966) was an Australian painter, print maker, designer and teacher who upheld the ideas of 'taste' and 'style'.

[3] Apart from two years spent in Sydney between 1912 and 1914 she worked in London 1903 from to 1921, associating with fellow Australian expatriates Charles Conder, Arthur Streeton and Tom Roberts.

[5] After returning to Sydney, Proctor exhibited with Margaret Preston in 1925 then with George Lambert and the Contemporary Group[6] who exhibited in Adrian Feint's Grosvenor Gallery in George Street from 1926 to 1928 with Grace Cossington Smith, Marion Hall Best, Elioth Gruner, Margaret Preston, Roland Wakelin and Roy de Maistre.

She derided the poor availability of the sort of luxury fabrics she had been used to seeing in London and Paris, and particularly the way Australian women wore what she considered shapeless hats.

[12] Proctor taught Adrian Feint the techniques of woodblock-engraving 1926–28, and they both produced covers for the Ure Smith magazine The Home.

She was still creating and exhibiting drawings of sure and subtle draughtsmanship until late in life, with her work showing at the Macquarie Galleries in Sydney.