The Chattenden and Upnor Railway (later known as the Lodge Hill and Upnor Railway) was a narrow gauge railway serving the military barracks and depot at Upnor and associated munitions and training depots. It was built in 1873 as a 18 in (457 mm) gauge railway, converted to 2 ft 6 in (762 mm) narrow gauge around 1885, and continued in use until 1961.