The name of the town may be derived from the
Old English for ''Naegl's island
, although it has also been suggested it was spelt Naylsey'' in 1657. The parish of Nailsea was part of the
Portbury Hundred. Little is known of the area occupied by Nailsea before the coal mining industry began, although it was used as a quarry in Roman times from which
pennant sandstone was extracted. The Romans otherwise ignored Nailsea from 40 to 400 AD, but left a small villa near Jacklands Bridge. Nailsea's early economy relied on
coal mining, which began as early as the 16th century. The earliest recorded date for
coal mining in Nailsea was 1507 when coal was being transported to light fires at
Yatton. By the late 1700s the town had a large number of pits. Around this time Nailsea was visited by the social reformer
Hannah More who founded a Sunday school for the workers. The
Elms Colliery,(Middle Engine Pit), one of the most complete examples of an 18th-century colliery left in England, is now in disrepair. It has been designated a
Scheduled Ancient Monument and is included in the
Heritage at Risk Register produced by
English Heritage. Remains of the old pits, most of which had closed down by the late 19th century as mining capital migrated to the richer seams of
South Wales, are still visible around the town. The coal mines attracted
glass manufacturer John Robert Lucas, who in 1788 established the
Nailsea Glassworks that became the fourth-largest of its kind in the United Kingdom, mostly producing low-grade bottle glass. The works closed down in 1873, but "Nailsea" glass (mostly made by glass workers at the end of their shift in Nailsea and at other glass works) is still sought after by collectors around the world. The site of the glass works has been covered by a
Tesco supermarket car park, leaving it relatively accessible for future
archaeological digs. Other parts of the site have been cleared and filled with sand to ensure that the remains of the old glass works are preserved. Nowhere was a historical
hamlet that existed on the west side of the town until 1967, when it was demolished for development.
Nowhere Wood, a small residential woodland, is named after it. The 15th-century
Nailsea Court, southwest of the town, is a grade I
listed building. ==Governance==