St. Marien, Protestant church building in Neuenkirchen, Cuxhaven, Germany

St. Marien is an early Gothic brick church: a rectangular nave 18.70 m long, 9.60 m wide and 5.90 m high, a recessed late Gothic choir with a straight east end, and a massive west tower 35 m high with 1.10 m thick walls and an octagonal spire. The whole building was re-faced in brick in 1901; original masonry remains visible on the nave's east gable wall.

The building originates from the 14th century when its core structure was established, receiving significant additions like the choir section during the 16th century. These gradual modifications reflect the changing needs and resources of the community over generations.

The parish, ev.-luth. Kirchengemeinde Neuenkirchen/St. Marien, had about 950 members in 2021 and belongs to the Cuxhaven-Hadeln church district, with the pastor's office in Otterndorf. The church is dedicated to Mary. Names on the ceiling's peasant coats of arms of 1618 read mirror-reversed, and the west gallery of 1662 carries 14 painted panels of the Evangelists and Apostles.

The church stands in Neuenkirchen in the Land Hadeln; the parish office is at An der alten Medem 1, while pastoral care is handled by the Pfarramt in Otterndorf, Himmelreich 2. The west tower was restored in 1990/92, and its lower room, once vaulted, served as arrest cells from 1689. The building is a listed monument, so access follows parish arrangements.

The tower clock of 1896 by J. F. Weule of Bockenem still sits on the intermediate floor, now driven electrically. In the nave, a bronze font of the first half of the 14th century rests on three figures, its bowl carved with 18 overlapping Passion scenes; a worked stone found nearby may be a piscina that drained baptismal water outside.