Major-general Ludolph Hendrik van Oyen (25 April 1889, in The Hague – 28 July 1953) was the Chief of Staff of the Royal Netherlands East Indies Army from 1942 to 1946, during World War II.

From 1922 to 1925 he attended the rank of captain in the Secondary School in The Hague and was afterwards appointed major and commander of the ML-KNIL.

[clarification needed] In 1942 he was appointed deputy commander of Vice-Marshal Sir Richard Peirse, who commanded the air forces within the ABDACOM, a collaboration between the American, British, Dutch and Australian forces on February 25, 1942, and conducted by Senior General Sir Archibald Wavell.

Oyens task was rebuilding the Dutch armed forces with a view to a Japanese surrender.

He was succeeded by Lieutenant-General Simon Hendrik Spoor, whose ideas did not differ much from those of Van Oyen.