thumb|Portrait of Van Bynkershoek by [[Philip van Dijk, 1733 (Collection Cultural Heritage Agency of the Netherlands).]]
Cornelis van Bijnkershoek (a.k.a. Cornelius van Bynkershoek) (29 May 1673, in Middelburg – 16 April 1743, in The Hague) was a Dutch jurist and legal theorist who was educated at the University of Franeker. After two years study, he began to apply himself to jurisprudence. He resolved to reform the common law of his country, and took as the basis of a new system the principles of Roman law.
He later contributed to the development of international law in works like De Dominio Maris Dissertatio (1702); Observationes Juris Romani (1710), of which a continuation in four books appeared in 1733; the treatise De foro legatorum (1721); and the Quaestiones Juris Publici (1737). Complete editions of his works were published after his death; one in folio at Geneva in 1761, and another in two volumes folio at Leiden in 1766.