Sir Ivor Martin Crewe DL FAcSS (born 15 December 1945) was until 2020 the Master of University College, Oxford, and President of the Academy of Social Sciences.

The son of Jewish refugees from Czechoslovakia and Germany,[1] Crewe was educated at Manchester Grammar School and then went to Exeter College, Oxford, where he gained a first-class BA in Philosophy, Politics, and Economics in 1966.

With Dr David Rose, he established the British Household Panel Study and founded the Institute of Social and Economic Research at Essex in 1990.

Peter Preston's review in The Guardian commented "It should be a deeply distressing account of blunders past, present and pending from two of our most brilliant political analysts, but in fact you have to smile gallantly through many of the disasters that throng 400 or more of these pages".

[3] Named in his honour and designed by the architect Patel Taylor, the Ivor Crewe Lecture Hall at the University of Essex was completed in 2006.