Lammas (disambiguation)
Lammas may refer to:
- Lammas (festival), a Christian holiday
- Lammas Ecovillage, a Welsh off-grid ecovillage
- Lammas growth, a second period of shoot growth in trees that occurs in summer
- Lammas School, a British secondary and sixth form school
- Lammas Night, a WW2 themed fantasy novel
- Lammas green, a housing estate in London
- Ould Lammas Fair, an annual regional fair
- Lammas Limited, manufacturer of motor cars