Quintus Sertorius (died 72 BC) was a Roman statesman and general, born in Nursia, in Sabine territory around 123 BC.
After acquiring some reputation in Rome as a jurist and an orator, he began a military career. His first recorded campaign was under Quintus Servilius Caepio at the Battle of Arausio, where he showed unusual courage. Serving under Gaius Marius in 102 BC, Sertorius succeeded in spying on the wandering German tribes that had defeated Caepio. After this success, he fought at the great Battle of Aquae Sextiae (now Aix-en-Provence, France) in which the Teutones were decisively defeated. In 97 BC, he served in Hispania (the Iberian Peninsula, comprising modern Spain and Portugal) as a military tribune under Titus Didius.