Birkhall is a 53,000 acre (210 km²) estate on Royal Deeside, Aberdeenshire, Scotland. It is alongside the River Muick to the southwest of Ballater.
The house of Birkhall, built by the Gordons of Abergeldie, has a stone over its front door inscribed R.G. M.G. 1715. It was formerly called Stiren and is marked as "Steirn" on Gordon of Straloch's map of 1654. It is a plain three-storeyed house which has been greatly altered since 1715, and is now owned by the Royal Family.
The property was acquired from the Gordon family (owners of the Abergeldie estate) by Prince Albert, consort to Queen Victoria. It became the Deeside home of Queen Elizabeth, the Queen Mother, and later of Prince Charles, the Duke of Rothesay, who uses the estate as a private retreat and spent his second honeymoon here in 2005. A fine wire suspension bridge erected in 1880 by John Harper crosses the River Muick here.