Manius Otacilius Crassus was a Roman consul of Samnite origins and served during the Punic Wars. His consular colleague in 263 BC was Manius Valerius Maximus Corvinus Messalla, and in 246 BC his colleague was Marcus Fabius Licinus.
- Nigel Bagnall (2008). The Punic Wars: Rome, Carthage and the Struggle for the Mediterranean. Random House. pp. 53f. ISBN 978-1-4090-2253-4.
- Polybius, 1.16