Erith Marshes is an area of grazing marsh beside the south bank of River Thames in London, England. It is located next to the Crossness Sewage Treatment Works and is owned by Thames Water. It is a Site of Metropolitan Importance for Nature Conservation in the London Borough of Bexley. It can be accessed by London Buses routes 177, 180, 229, 401 and 472.
The bulk of the marshes which once existed from Woolwich to Erith have now been built upon. The small part that remains is owned by Thames Water, who manage an award winning wildlife area and Tilfen Land. Note: At the time of writing Tilfen Land have planning permission to build an industrial park on around 33% of the remaining marshes and at its northern end Londons hugh waste incinerator has planning permission to be built. The expansion of Thamesmead to the west, Erith to the east and Belvedere north of the railway line and the earlier construction of Crossness Sewage Works makes this an area that will soon almost totally disappear within the next few years.
- ^ "Erith Marshes". Greenspace Information for Greater London. 2006. Retrieved 10 September 2012.
Coordinates: 51°29′56″N 0°08′17″E / 51.499°N 0.138°E