Apulu (Etruscan: 𐌖𐌋𐌖𐌐𐌀), also syncopated as Aplu (Etruscan: 𐌖𐌋𐌐𐌀), is an epithet of the Etruscan fire god Śuri as chthonic sky god, roughly equivalent to the Greco-Roman god Apollo. Their names are associated on Pyrgi inscriptions too. The name Apulu or Aplu did not come directly from Greece but via a Latin center, probably Palestrina.

Under the name Apulu, he is known as god of the Sun and light, thunder and lightning, healing and plague, as well as the protector of divination, but he also has volcanic and infernal characteristics.^{[page needed]}

He was also known as Rath, Usil and Vetis, among other names.

He's mentioned as son of Tinia and Semla, brother of Fufluns and twin brother of Aritimi.

In art, he is depicted with a crown and laurel branches. His most famous representation is the Apollo of Veii, attributed to Vulcas.

He does not appear on the Liver of Piacenza.

The national divinity of the Greeks, Apollo has been recognized as a god of archery, music and dance, truth and prophecy, healing and diseases, the Sun and light, poetry, and more.

Medicine and healing are associated with Apollo, whether through the god himself or mediated through his son Asclepius. Apollo delivered people from epidemics, yet he is also a god who could bring ill-health and deadly plague with his arrows. The invention of archery itself is credited to Apollo and his sister Artemis. Apollo is also an important pastoral deity, and was the patron of herdsmen and shepherds. Protection of herds, flocks and crops from diseases, pests and predators were his primary duties.