| Width Style: | person |
| Laurens Alteras | |
| Birth Name: | Laurens Jacobsz Alteras |
| Birth Date: | Unknown date |
| Branch Label: | Branch |
| Rank: | Vice admiral |
| Battles Label: | Conflict |
Laurens Jacobsz Alteras was a 17th-century Dutch vice admiral who distinguished himself as fleet commander under Jacob van Heemskerck in the battle of Gibraltar of 1607.
After the battle and Van Heemskerck's death, he took control of the Dutch fleet. He died on 16 October 1622, having successfully defended a Dutch merchant fleet from an attack by a Spanish armada.