Abramo Bartolommeo Massalongo (13 May 1824 - 25 May 1860) was an Italian paleobotanist and lichenologist. He was born in Tregnago in the Province of Verona and took a great interest in botany as a young man. Massalongo joined the faculty of medicine at the University of Padua in 1844. Along with Gustav Wilhelm Körber, he founded the "Italian-Silesian" school of lichenology. He was the husband of Maria Colognato and the father of hepaticologist Caro Benigno Massalongo.