Lanyon is an English surname, and may refer to:
- Charles Lanyon (1813-1889), English architect
- Hastie Lanyon, a fictional character in Strange Case of Dr Jekyll and Mr Hyde
- Owen Lanyon (1842-1887), British colonial administrator
- Peter Lanyon (1918-1964), British painter
- Walter C. Lanyon (1887-1967), English religious writer
- Josh Lanyon, an American author