Diana Leung Wai-tung, MBE, JP (Chinese: 梁煒彤; born 1946) is a former member of the Legislative Council of Hong Kong.
She and Edward Leong and Jimmy McGregor, two other legislators, launched the Hong Kong Democratic Foundation in 1989 and Leung served as the founding vice-chairperson, which was seen as pro-democratic liberal political group at the time.
She was one of the only three appointed members who affiliated with political organisation (the other two being Maria Tam and Lau Wong-fat).
She was considered as radical among the majority of the appointed and pro-government legislative councillors, as she and Szeto Wah urged for repealing the government's regulation of political activities in schools, instead of moderating as the government revised on the Education (Amendment) Bill.
She was one of the six female candidates in the 1991 Legislative Council election, the first ever direct election in the territory but was defeated by the candidates from the United Democrats of Hong Kong, notably Martin Lee in Hong Kong Island East.