'''Firstborn''' is a word referring to a couples' first child.

It can also refer to:
* ''Firstborn (film)'', a 1984 film that stars Teri Garr, Peter Weller, Christopher Collet, Corey Haim, Sarah Jessica Parker and Robert Downey Jr.
* ''Firstborn (TNG episode)'', a seventh-season ''Star Trek: The Next Generation'' episode.
* ''Firstborn (novel)'' (2007), an upcoming ''A Time Odyssey'' novel by Arthur C. Clarke and Stephen Baxter.
* Firstborn (band), a rock band from the United Kingdom.
* ''The Firstborn Is Dead'', the second album released by Nick Cave & The Bad Seeds.
* Fast of the firstborn, a fast day in Judaism which usually falls on the day before Passover.
* Plague of the Firstborn, one of the biblical Plagues of Egypt.
* Firstborn Multimedia, a multimedia design firm based in New York City.