The Newcastle town wall is a medieval defensive wall, and Scheduled Ancient Monument, in Newcastle upon Tyne, England.
It was built during the 13th and 14th centuries, and helped protect the town from attack and occupation during times of conflict.
It was approximately 3 kilometres (2 mi) long, at least 2 metres (6.5 ft) thick, up to 7.6 metres (25 ft) high, and had six main gates: Close Gate, West Gate, New Gate, Pilgrim Gate, Pandon Gate and Sand Gate. It also had seventeen towers, as well as several smaller turrets and postern gates.
The town wall was kept in good repair whilst there was a threat of invasion from Scottish armies, and the town was successfully defended on at least two occasions; but with the decline of the border wars between England and Scotland, the wall was allowed to deteriorate.
During the English Civil War, the Scots were able to breach the wall using mines and artillery. By the mid-18th century the wall had become obsolete and, as the town was redeveloped, large sections were demolished leaving only parts standing.
The most substantial remains are the West Walls, on the western side of the city.