Grattius was a Roman poet of the age of Augustus (63 BC – 14 AD). He was the author of a Cynegeticon, a poem on hunting, of which 541 hexameter lines remain. He describes various kinds of game, methods of hunting, and the best breeds of horses and dogs.
He may have been a native of Falerii but this assertion rests on the doubtful authority of a single lost manuscript, employed in an early printing. The only reference to him in any extant ancient writer is a passing reference in Ovid, Ex Ponto.