Horeb is a hamlet in Carmarthenshire, Wales, near the town of Llanelli. It is situated east of the village of Five Roads (Welsh: Pum Heol) about five miles from Llanelli. The hamlet has one pub, the Waun Wyllt. It is situated in the River Lliedi valley (Welsh: Cwm Lliedi), in which the river bearing the same name flows. Welsh is the dominant language.

Horeb is renowned for its limericks, one of which is:

There once was a town called Horeb
A place in hunger of fame.
But scared that they were too small
to be considered a jewel
they added the word "All" to the end of their name....
... nobody came!

• Horeb Mill