Dunham Massey is a civil parish in the Metropolitan Borough of Trafford, Greater Manchester, England. The parish includes the villages of Sinderland Green, Dunham Woodhouse and Dunham Town, along with Dunham Massey Park, formerly the home of the last Earl of Stamford and owned by the National Trust since 1976. Dunham Massey was historically in the county of Cheshire, but since 1974 has been part of Trafford Metropolitan Borough; the nearest town is Altrincham. As of the 2001 census, the parish had a population of 475.
Dunham Massey has a long history, as reflected in its 45 listed buildings. It was a locally important area during the medieval period, and acted as the seat for the Massey barony. The Georgian hall, with the remains of a castle in its grounds, is a popular tourist attraction. There are two Sites of Special Scientific Interest in Dunham Massey: Dunham Park, located south of Dunham Town, and Brookheys Covert.