Somerset landowner of Alfoxton Park. He inherited the Alfoxton estate from his great-uncle, the Reverend Lancelot St. Albyn, and assumed the St. Albyn surname by royal licence in 1806.

The sources consulted do not provide a complete named descent of the manorial title after Langley's death.

Research sources:
- Somersetshire Archaeological and Natural History Society, The Sheriffs of Somerset, entry for 1850 Langley St. Albyn, citing Burke's Landed Gentry; supplementary biographical entry in John Sainsbury's Dictionary of the Universities of Oxford and Cambridge. — https://sanhs.org/wp-content/uploads/19-The-Sheriffs-of-Somerset-2.pdf