Lodewijk Caspar Valckenaer (Leeuwarden, 7 June 1715 – Leiden, 15 March 1785), latinized as Ludovici Caspari Valckenaer, was a Dutch classical scholar, at Leiden. He was a follower of Tiberius Hemsterhuis, and his successor in 1766 in the chair of Greek at Leiden.^{[citation needed]} He was born in Leeuwarden.

The jurist and politician Johan Valckenaer (1759–1821) was his son.