Joanna Dorothy Haigh, (born 7 May 1954) is a British physicist and academic.
Before her retirement in 2019 she was Professor of Atmospheric Physics at Imperial College London, and co-director of the Grantham Institute for Climate Change and the Environment.
She is a former head of the Department of Physics at Imperial College London.
She is also a Fellow of the Royal Society, and a former president of the Royal Meteorological Society.