Haleth is a fictional character from J.R.R. Tolkien's Middle-earth legendarium. She was a leader of the Second House of the Edain, called the Folk of Haleth after her.

At the time of her birth, the Second House of Men had settled in Thargelion, in East Beleriand, living in separate homesteads and having no lords of their own. But in Y.S. 375 of the First Age Morgoth sent out an Orc-raid against them. The Men were caught off-guard, and a great part of their people was wiped out. The remnant was gathered under one Haldad and his twin children, daughter Haleth and son Haldar; and they held out for days in a stockade until the Noldor rescued them, by which time both Haldad and Haldar were slain.