Nico Ditch
| Nico Ditch running west near Levenshulme | |
| Location | Greater Manchester, England | 
|---|---|
| Coordinates | 53°27′03″N 2°10′37″W / 53.4508°N 2.1769°W | 
| Designer | Anglo-Saxons | 
| Type | Ditch and earthwork | 
| Length | 6 mi (9.7 km) | 
| Width | 4–5 yards (3.7–4.6 m) | 
| Completion date | 5th – 11th century | 
| Dismantled date | Large sections lost to urban expansion | 
Nico Ditch is a six-mile (9.7 km) long linear earthwork between Ashton-under-Lyne and Stretford in Greater Manchester, England. It was dug as a defensive fortification, or possibly a boundary marker, between the 5th and 11th century. The ditch is still visible in short sections, such as a 330-yard (300 m) stretch in Denton Golf Course. For the parts which survived, the ditch is 4–5 yards (3.7–4.6 m) wide and up to 5 feet (1.5 m) deep. Part of the earthwork is protected as a Scheduled Ancient Monument.