Giorgio Pestelli (born 1938) is an Italian musicologist.
He is perhaps most notable for his 1967 edition of the 555 keyboard sonatas of Domenico Scarlatti, which purports to correct some anachronisms and provides an alternative numbering system (distinguished by P numbers) to those of Alessandro Longo (L numbers) and Ralph Kirkpatrick (K or Kk numbers). His most notables books are: L'età di Mozart e di Beethoven (1979, 1991), Canti del destino. Studi su Brahms (2000, Viareggio Price, 2001), Gli Immortali. Come comporre una discoteca di musica classica (2004).