The Battle of Cape Ecnomus or Eknomos () (256 BC) was a naval battle, fought off Cape Ecnomus (modern day Poggio di Sant'Angelo, Licata, Sicily), between the fleets of Carthage and the Roman Republic, during the First Punic War. Due to the number of ships and crews involved (about 300 rowers and 120 combat troops per ship), this battle was one of the largest naval battles of the ancient Mediterranean world, and is a candidate for the largest naval battle in history.