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- Richard Lander, explorer of Africa
- Walter Langley, artist and a member of the Newlyn School
- Cassandra Latham, contemporary witch and "village wisewoman" of St. Buryan, Cornwall
- John Lawn (miner) miner of gold in New Zealand
- John le Carré, novelist
- Bernard Leach, potter who set up a studio pottery in St. Ives in the 1920s
- Charles Lee (1870–1956), novelist
- Michael Loam, inventor of the man engine
- Richard Lower, blood transfusion pioneer
- Stanley Lucas (15 January 1900 – 21 June 2010) from Bude, Cornwall was a British supercentenarian.
- Benjamin Luxon baritone singer
Read more about this topic: List Of People From Cornwall