Alison Grant Harcourt AO (née Doig; born 24 November 1929) is an Australian mathematician and statistician most well-known for co-defining the branch and bound algorithm along with Ailsa Land whilst carrying out research at the London School of Economics. She was also part of the team which developed a poverty line as part of the Henderson Inquiry into poverty in Australia and helped to introduce the double randomisation method of ordering candidates used in Australian elections.