Lau married Bo Wing-kam (1954–2003) in 1977 and they were divorced in 1992. They had two children: a son, Lau Ming-wai (born 1980) and daughter Jade Lau Sau-yung (born 1983). In 2008, Lau Ming-wai's wife gave birth to mix twins, they are Lau's eldest grandchildren. Lau Ming-wai, a British citizen, is vice-chairman of Chinese Estates Group and is both chairman of the government's Commission on Youth and on the steering committee of the HK$10 billion Community Care Fund, established in 2010. He was formerly a member of the Commission on Poverty. In 2011, he was part of Henry Tang's election team for the 2012 chief executive election.