Martinus

Martinus may refer to:
 * Martin (magister militum per Armeniam), 6th-century Byzantine/East Roman general
 * Martinus (son of Heraclius), 7th-century Byzantine/East Roman co-emperor
 * Martinus of Arles, doctor of theology, priest, and author on demonology and witches
 * Saint Martinus or Saint Martin of Tours
 * Martinus College, a secondary school in the Netherlands
 * VV Martinus, a Dutch volleyball club

People with the name

 * Derek Martinus (1931–2014), British television and theatre director
 * Flavius Martinus, vicarius (governor) of the Roman provinces of Britain
 * Martinus Beijerinck, Dutch microbiologist
 * Martinus von Biberach (died 1498), theologian from Heilbronn, Germany
 * Martinus Bosselaar, Dutch football (soccer) player
 * Martinus Brandal, Norwegian engineer and businessman
 * Martinus Dom, first abbot of the Trappist Abbey of Westmalle
 * Martinus Fabri, Dutch composer of the late 14th century
 * Martinus Gosia, scholar and Italian jurist, one of the Four Doctors of Bologna
 * Martinus Gunnarsen, Norwegian pop singer, member of the pop duo Marcus & Martinus
 * Martinus Hamconius, Dutch writer and historian
 * Martinus Houttuyn, Dutch naturalist
 * Martinus Nijhoff, Dutch poet and essayist
 * Martinus Mosvidus, author and editor of the first book printed in the Lithuanian language
 * Martinus Polonus, Dominican priest and church historian
 * Martinus Rørbye, Danish painter
 * Martinus Sieveking, Dutch classical composer and pianist
 * Martinus Sonck, first Dutch Governor of Formosa
 * Martinus Adrianus Stam, Dutch architect, interior designer, and industrial designer
 * Martinus Theunis Steyn, lawyer and politician
 * Martinus Thomsen, Danish mystic and spiritual teacher
 * Martinus J. G. Veltman, Dutch theoretical physicist