The station in the Hampshire village of Marchwood (Wikipedia) closed in 1966 when passenger services on the Fawley branch line from Totton (a.k.a. Waterside line) were withdrawn.

Three Rivers Rail Partnership is the promoter of a scheme to reopen the Waterside line. The proposed southern terminus is a new station called Hythe & Fawley Parkway and further stations at Marchwood (reopened) and Hythe Town (new station) are included in the scheme.

Waterside line. Map source: Three Rivers Community Rail Partnership

Map source: Bringing Passenger Trains Back to the Waterside (pdf), Three Rivers Rail Partnership.
Three Rivers Community Rail Partnership – Network Map

Map source: Bringing Passenger Trains Back to the Waterside (pdf), Three Rivers Rail Partnership.
Location of proposed Marchwood station

© OpenStreetMap contributors | OpenStreetMap copyright notice | View context map of proposed location

Proposed stations on a reopened Waterside line

Marchwood

Hythe Town

Hythe & Fawley Parkway

Read more about the Waterside line reopening scheme

Further reading

Fawley branch line – Wikipedia

Marchwood, on Disused Stations website

Marchwood railway station – Wikipedia