A Greek-English Lexicon is the standard lexicographical work of the ancient Greek language, begun in the nineteenth century and now in its ninth (revised) edition.

It was edited by Henry George Liddell, Robert Scott, Henry Stuart Jones, and now Roderick Mackenzie, and published by the Oxford University Press. Now standardly referred to as the Liddell-Scott-Jones or LSJ, and sometimes humorously referred to as "the big Liddell" or "the great Scott". A version of this lexicon can be searched online via The Perseus Project.

The seventh edition of the LSJ was abbreviated into An Intermediate Greek-English Lexicon, which is most commonly used in classroom settings; this is humorously referred to as "The middle Liddell". There is also the even shorter A Lexicon: Abridged from Liddell and Scott's Greek-English Lexicon, which is sometimes called "the little Liddell".

The first editor of the LSJ, Henry George Liddell, was Dean of Christ Church, Oxford, and the father of Alice Liddell, the eponymous Alice of the writings of Lewis Carrol.