Gaspar or Casper van Eyck was a Flemish painter of marine subjects and sea-fights. He worked in Antwerp and spent some time working in Genoa and Madrid.

Van Eyck was born in Antwerp as the son of the tailor Nicolaas van Eyck, originally from the Prince-Bishopric of Liège, and Joanna Ros. He was baptized on 6 february 1613. He had a sister and three brothers, of whom Nicolaas became a painter of equestrian and battle scenes, landscapes and portraits. He was the uncle of the landscape painter Jan Carel van Eyck.

He was registered at Antwerp's Guild of Saint Luke as a pupil of the prominent marine painter Andries van Eertvelt under whom he started to study in 1625. Van Eyck became a master in the Guild of St. Luke in the guild year 1632-1633.

He traveled in 1632 to Genoa, where he collaborated with the Flemish painter and art dealer Cornelis de Wael. De Wael and his brother Lucas had established a workshop in Genoa in 1628 which had become the centre of the colony of Flemish artists who resided in or passed through the city. These Flemish artists could take advantage of the work and artistic activity that the brothers' workshop attracted. Van Eyck's master Andries van Eertvelt had also worked in Genoa with the de Wael brothers in the period from 1628 to 1630.

He was in Madrid in 1649 and 1650 where he was briefly working for the court. He was there likely with the Flemish painter Giovanni di Filippo del Campo with whom he collaborated on paintings. He was back in Antwerp in 1656 and then moved to Brussels the same year. Here he remained until his death in 1673. He is believed to have suffered from mental illness and his brother Hendrick, who was a clergyman, was his guardian after the death of their parents.