| Conflict: | Battle of Manlian Pass |
| Date: | 181 BC |
| Place: | Manlian Pass, Celtiberia (Spain) |
| Result: | Roman victory |
| Combatant1: | Roman Republic |
| Combatant2: | Celtiberians |
| Commander1: | Q. Fulvius Flaccus |
| Commander2: | unknown |
| Casualties1: | 4,491 |
| Casualties2: | 17,000 |
The Battle of Manlian Pass took place between Romans under Q. Fulvius Flaccus and Celtiberi in 181 BC. Fulvius had arrived as praetor assigned to the province of Hispania Ulterior in 180, and continued as proconsul for the following two years. The fullest account of the battle is given by Livy (40.39-40):