| Earlstoun Castle | |
|---|---|
 Earlstoun Castle, viewed from the south-east | |
| Type | Tower house |
| Location | Near St John's Town of Dalry, Dumfries and Galloway |
| Coordinates | 55°07′52″N 4°10′39″W / 55.13111°N 4.17750°W |
| Designated | 1937 |
| Reference no. | SM1118 |
  Location of the tower within Dumfries and Galloway | |
Earlstoun Castle, sometimes spelled Earlston Castle, is a derelict tower house near St John's Town of Dalry in Dumfries and Galloway, Scotland. Built in the late sixteenth century, it was home to members of the Gordon family, including William Gordon of Earlston who was killed at the battle of Bothwell Bridge. It is unusual for a tower house of its age for its lack of defensive arrangements: it has no gun loops, its roof is without a parapet or corner turrets, and it lies in open ground without natural defences.
The castle was designated a scheduled monument in 1937; it was also designated a Category A listed building in 1971, but was delisted in 2017, while retaining its scheduled monument status.