Stow Maries Halt is a 2.2-hectare (5.4-acre) nature reserve south of Stow Maries in Essex.

It is owned and managed by the Essex Wildlife Trust.

[1] The former Stow St Mary Halt railway station has marshes, a pond and scrub, together with adjoining pasture which is also part of the reserve.

Butterflies include purple and white-letter hairstreaks, and there are flowers such as common fleabane and wild carrot.

[1] There is access from Church Lane.