Marnham is a civil parish in the Bassetlaw District of Nottinghamshire, England. The parish contains seven listed buildings that are recorded in the National Heritage List for England. Of these, one is listed at Grade I, the highest of the three grades, and the others are at Grade II, the lowest grade. The parish contains the settlements of High Marnham, Low Marnham and Skegby, and the surrounding countryside. The listed buildings consist of a church, two houses, a pigeoncote, a village hall, a farmhouse and farm buildings.