Probalinthus or Probalinthos (Ancient Greek: Προβάλινθος) was a deme of ancient Attica, one of the Attic Tetrapolis (along with Marathon, Tricorythus, and Oenoe) located in the plain of Marathon. Probalinthus belonged to the phyle Pandionis.

The site of Probalinthus is located southeast of modern Vrana.

This article incorporates text from a publication now in the public domain: Smith, William, ed. (1854–1857). "Marathon". Dictionary of Greek and Roman Geography. London: John Murray.

38°07′18″N 23°56′56″E/38.121625°N 23.9489995°E/ 38.121625; 23.9489995