August Grahl (26 May 1791, Göhren-Lebbin - 13 June 1868, Dresden) was a German portrait painter and miniaturist.
He quit school to join the Black Hussars of Ludwig Adolf Wilhelm von Lützow and fight in the War of Liberation.
Following his wife's death in 1821, after only two years of marriage, he began travelling more extensively, ending in Rome where he lived until 1830 at the Palazzo Caffarelli.
He spent 1831 in England, where he painted a portrait of Queen Adelaide that was later made into an engraving by Samuel William Reynolds.
He was also a significant art collector, possessing a large selection of Italian paintings and lithographs.