Karl Wilhelm Dindorf (Latin: Guilielmus Dindorfius; 2 January 1802 – 1 August 1883) was a German classical scholar.
Disappointed at not obtaining the ordinary professorship when it became vacant in 1833, he resigned his post in the same year, and devoted himself entirely to study and literary work.
He also wrote a work on the metres of the Greek dramatic poets, and compiled special lexicons to Aeschylus and Sophocles.
Much of his attention was occupied by the re-publication of Stephanus's Thesaurus (Paris, 1831–1865), chiefly executed by him and his brother Ludwig, a work of prodigious labour and utility.
The book was printed, and a few copies had been circulated, when the forgery was discovered, just in time to prevent its being given to the world under the auspices of the University of Oxford.