Newhailes House is a Palladian style country house which stands in 80 acres of parkland on the edge of the small town of Musselburgh in East Lothian, Scotland. Originally named Whitehills, it is a Category A listed building which is now occupied and maintained by the National Trust for Scotland.

James Smith was a Scottish architect, who pioneered the Palladian style in Scotland. He was described by Colen Campbell, in his Vitruvius Britannicus (1715–1725), as "the most experienced architect of that kingdom".