Fabricius (Latin: smith, German: Schmied, Schmidt) may refer to:
- people from the Ancient Roman gens Fabricia:
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- Gaius Fabricius Luscinus, the first of the Fabricii to move to Rome
- Carel Fabricius (1622–1654), painter
- David Fabricius (1564–1617), German theologian and astronomer, discoverer of the variable star Mira
- Georg Fabricius (1516–1571), German poet, historian and archaeologist
- Hieronymus Fabricius or Girolamo Fabrizio (1537–1619), Italian anatomist
- Hildanus Fabricius (Wilhelm Fabry) (1560–1634), German anatomist and surgeon
- Johan Fabricius (1899–1981), Dutch writer, journalist and adventurer
- Johann Albert Fabricius (1668–1736), German classical scholar, publisher, and librarian
- Johann Phillip Fabricius (1711–1791), German Christian missionary in southern India
- Johan Christian Fabricius (1745–1808), Danish botanist and entomologist
- Johannes Fabricius, (1587–1615) Frisian astronomer, discoveror of sunspots, son of David Fabricius
- Otto Fabricius (1744–1822) Danish missionary, naturalist, ethnographer and explorer of Greenland.
- Philipp Conrad Fabricius (1714–1774), botanist
- Werner Fabricius, German composer, father of Johann Albert Fabricius.
- Wilhelm Fabricius, Hitler's ambassador to Romania
- Alexander Carpenter, Latinized Fabricius, (fl. 1429)
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