Hardmead is a small village and civil parish in the unitary authority area of the City of Milton Keynes, Buckinghamshire, England. It is in the north of the borough, about west of Bedford, north-east of Central Milton Keynes and north east of Newport Pagnell. The village is close to the A422 road, on a very small road linking that to nearby Newton Blossomville. Together with the neighbouring village of Astwood, it forms the civil parish of Astwood and Hardmead.
The village name is Old English in origin, and means 'Heoruwulf's meadow'. In the Domesday Book of 1086 it was called Herulfmede. The village is very small with a population of around 100 people. The nearest pub is located one mile away in Astwood and the nearest shop is about four miles distant.
Together with the neighbouring parish of Hardmead, it has a joint parish council, Astwood and Hardmead. At the 2021 census, the component parishes were enumerated separately and had a combined population of 305.
The former church of St Mary's Hardmead is Grade I listed and parts date from the 12th century. It has been redundant since the 1980s and is now in the care of the charity Friends of Friendless Churches. There are monuments in the church to the Catesby family and to the explorer Robert Shedden.
The parish has a scheduled monument, a medieval "moated site 410m south east of Maukins" (at ).