The gens Blossia, also spelled Blosia, was a Roman family of Campanian origin, which came to prominence during the Second Punic War. The most famous member of the gens is probably Gaius Blossius, an intimate friend of Tiberius Sempronius Gracchus, whom he urged to bring forward his agrarian law. He fled from Rome after the murder of Gracchus, and eventually took his own life for fear of falling into the hands of his enemies.