Milecastle 3 (Ouseburn) was a milecastle of the Roman Hadrian's Wall. No remains exist, but it was thought to have been located at the junction of the A187 Byker Bridge and Stephen Street.
Milecastle 1 was a milecastle of the Roman Hadrian's Wall. It was located near the valley of Stott's Pow. Its remains are covered over, and are located beneath the recreation ground at Miller's Dene. Early excavations and investigations of Turret 0B were mistakenly interpreted as Milecastle 1. The Milecastle sits within the parish of Wallsend.
Milecastle 2 (Walker) was a milecastle of the Roman Hadrian's Wall. No remains are currently visible, having been built over, but its probable location is at or near the junction of the A187 Fossway and Tunstall Avenue, in the parish of Wallsend.
Milecastle 5 was the first milecastle west of Pons Aelius fort of the Roman Hadrian's Wall. No remains exist of the milecastle, though its supposed position is at the junction of the A186 Westgate road and the B1311 Corporation Street. No remains currently exist.
Milecastle 7 was a milecastle of the Roman Hadrian's Wall. The milecastle itself has not been discovered by archaeologists and its presumed location lies beneath a modern housing development. Roman finds have been made in the area and the associated structure of Turret 7B is a significant surviving structure of the wall.
Milecastle 8 was a milecastle of the Roman Hadrian's Wall. Its remains are located in West Denton, Newcastle upon Tyne. The milecastle has two associated turret structures that are known as turret 8A and turret 8B. The turrets and milecastle were excavated in the 1920s, yielding some pottery and stone carvings, and have since been overlain by modern roads. The exact location of the structures is disputed, with the road hiding any surface traces. The Milecastle forms part of the Hadrian's Wall World Heritage Site.
Milecastle 9 was a milecastle of the Roman Hadrian's Wall. Its remains exist partially as a low platform, and are located in West Denton, 300 yards (270 m) from Chapel House Farm. However, the northern part of the remains are now mostly covered by the modern roads (A69/B6528). The milecastle marks a watershed between those with relatively well-defined positions and those whose position are less certain.
Milecastle 10 was a milecastle of the Roman Hadrian's Wall. It is located near to the modern village of Throckley in Tyne and Wear, northern England. Much of the milecastle lies beneath a road but partial remains of the north wall can be seen in the garden of Dene House. It has been excavated several times and its walls located, though the remains have been "considerably damaged by ploughing". Only one of the two associated turrets has been located and excavated.
Milecastle 12 (Heddon) was a milecastle of the Roman Hadrian's Wall. Its remains lay under Town Farm, Heddon-on-the-Wall, with nothing visible on the surface.
Milecastle 16 was a milecastle of the Roman Hadrian's Wall. The milecastle is located at Harlow Hill, Northumberland. There are no visible surface remains of the milecastle or either of its associated turrets.
Milecastle 17 (Welton/Whittledean) was a milecastle of the Roman Hadrian's Wall. The milecastle is located near to the Whittle Dene reservoirs and is visible as a platform in the ground. Just 174m west of the milecastle is a distinct change in wall construction, indicating that it may have formed a boundary between different legions. The existence of the milecastle has been known since at least 1732 and excavations have produced numerous finds and evidence of post-Roman occupation. The associated turrets both lie beneath the B3618 Military Road. A stone found near the milecastle is the only known written record of the name of Gaius Julius Marcus, a Roman Governor of Britain whose name has been erased from other inscriptions possibly because he fell out of favour with Emperor Caracalla.
Milecastle 23 (Stanley) was a milecastle of the Roman Hadrian's Wall. Its remains exist as a low, grass covered platform with traces of an external ditch. It is located to the south of the B6318 Military Road around 1.5 kilometres (0.93 mi) west of its junction with the A68.
Milecastle 27 was a milecastle of the Roman Hadrian's Wall. It was located on the line of Hadrian's Wall, approximately midway between the A6079 and the River North Tyne. Its remains survive as a slight squarish platform with a maximum height of 0.4 metres (1.3 ft), but it is poorly defined to the north and east.
Milecastle 24 was a milecastle of the Roman Hadrian's Wall. Its remains exist as a low platform, and are located to the south of the B6318 Military Road around 3 kilometres (1.9 mi) west of its junction with the A68.
Milecastle 25 (Codlawhill) was a milecastle of the Roman Hadrian's Wall. Its remains exist as a low platform, and are located to the south of the B6318 Military Road, nearly 5 kilometres (3.1 mi) to the west of its junction with the A68.
Milecastle 26 (Planetrees) was a milecastle of the Roman Hadrian's Wall. Its position is slightly to the south of, but mostly covered by the B6318 Military Road., and it is located around 700 metres (0.43 mi) east of the B6318 Military Road's junction with the A6079. No visible traces exist currently. The dimensions are the same as Milecastles 23, 24, and 25.
Milecastle 30 was a milecastle of the Roman Hadrian's Wall. Its remains exist as an outward-facing scarp with a maximum height of 0.8 metres (2.6 ft). Masonry from the east wall remains in situ. The remaining stretch is 3.1 metres (10 ft) in length by 2.25 metres (7.4 ft) thick, and survives to a height of 0.6 metres (2.0 ft). It is located at the western part of Limestone Corner, just off the B6318 Military Road.
Milecastle 32 (Carraw) was a milecastle of the Roman Hadrian's Wall. Its remains exist as earthworks and with no exposed masonry. The layout of the milecastle walls is defined by robber trenches (to a maximum depth of 0.3 metres. The north wall is beneath a modern wall.
Milecastle 34 (Grindon) was a milecastle of the Roman Hadrian's Wall. There are no visible remains, but the site is within a small, tree-filled, walled enclosure located around 0.5 kilometres (0.31 mi) east of Sewingshields farm.
Milecastle 50TW was a milecastle on the Turf Wall section of Hadrian's Wall. The milecastle is located close to the Birdoswald Roman Fort and is unique in that it was not replaced by a stone milecastle when the turf wall was upgraded to stone, the replacement wall instead running some 200m to the north. The milecastle was partially demolished by the Romans after it was abandoned. The milecastle was excavated in 1934 and several Roman rubbish pits discovered. The remains of the two turrets associated with this milecastle have also been located. As the turf wall lies some distance from the stone wall, the sites are not accessible from the Hadrian's Wall Path.
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