Norma Glasgo Reid, Lady Birley (born 28 April 1952 in Limavady, Northern Ireland) was Vice-Chancellor and Principal of the University of the Witwatersrand.

Birley was educated at Limavady Grammar School, in Northern Ireland, and obtained a BSc and a MSc in mathematics at Sussex University, graduating in 1974.

She became interested in pedagogy as a result of being asked to teach a Master's class of sociologists, in finding new graphical ways to communicate her subject to a reluctant audience.

In 2001, Birley was appointed as Vice-Chancellor and Principal of the University of the Witwatersrand in Johannesburg, South Africa, the first woman and only the fourth foreigner to hold the position in its 100-year history.

After the death of her husband, Sir Derek Birley, in May 2002, she faced renewed challenges to her leadership, led by the Chair of the University Council, and resigned in November 2002.