Andrew Dilnot CBE is a British economist and broadcaster. He was formerly the Director of the Institute for Fiscal Studies from 1991 to 2002 and is currently the Principal of St Hugh's College, Oxford. He was awarded a CBE in 2000 for services to economics and economic policy.

Dilnot attended Olchfa School in Swansea. He achieved eight O levels: four As, three Bs and a C. In A-levels he got an A in Maths, History and Economics and a D in French. He obtained a 2:1 degree in PPE from St John's College, Oxford; he would have obtained a First were it not for one of his Politics papers.

Dilnot was Director of the Institute for Fiscal Studies from 1991 to 2002.

Dilnot was the presenter of BBC Radio 4’s series on the beauty of numbers, More or Less. Dilnot and Michael Blastland co-wrote The Tiger That Isn't, which was based More or Less.

Dilnot became Principal of St Hugh's College in 2002, becoming the only principal of an Oxford College educated at a comprehensive school. He became a Pro Vice-Chancellor of Oxford University in 2005. He is an Honorary Fellow of St John’s College, Oxford, Queen Mary, University of London, the Swansea Institute of Higher Education and the Institute of Actuaries, and holds an Honorary Doctorate from City University.