Mačiulis is the masculine form of a Lithuanian family name. Its feminine forms are: Mačiulienė (married woman or widow) and Mačiulytė (unmarried woman).
The surname may refer to:
Jonas Mačiulis, Lithuanian professional basketball player Maironis, Lithuanian poet, birth name Jonas Mačiulis Teklė Mačiulienė, chief editor of Kauno diena newspaper (1987–1998), recipient of medal Už nuopelnus žurnalistikai ("For Merits in Journalism")