Craigleith (Scottish Gaelic: Creag Lìte) is a small island in the Firth of Forth off North Berwick in East Lothian, Scotland.

Craigleith is part of a chain of four islands near North Berwick, along with Bass Rock, Fidra and the Lamb.

(The Lothians are dotted with evidence of ancient volcanic activity, such as Bass Rock and Arthur's Seat.)

[3] The puffin colony on Craigleith, once one of the largest in Britain with 28,000 pairs, became endangered from 1999 onwards, due to an invasion of the non-endemic plant tree mallow, thriving with warmer winters, which choked the puffins' burrows, preventing them from rearing their chicks, or "pufflings".

Since then, hundreds of volunteers have been working hard to rid the island of the problem, ferried out by boat from the Seabird Centre during the winter months, when the puffins are out at sea.