Gerald Edward Aylmer, FRHistS FBA (30 April 1926, Greete, Shropshire – 17 December 2000, Oxford) was an English historian of 17th century England.
The thesis, in two volumes, was 1208 pages long: the Modern History Board subsequently introduced a word-limit.)
In 1993 Aylmer was honoured with a festschrift edited by his long-time colleagues John Morrill and Paul Slack and his former doctoral student Daniel Woolf.
Aylmer's most substantial historical contribution was his trilogy on seventeenth-century administration before, during and after the Civil War.
The second volume showed that Interregnum reforms had real, if not absolute, effects; the third, published posthumously, treated the partial return to older practices under Charles II.