|Location||Dumfries and Galloway, Scotland|
|Primary inflows||several small burns|
|Primary outflows||Castle Loch burn|
|Max. length||1.25 mi (2.01 km)|
|Max. width||0.5 mi (0.80 km)|
|Surface area||92.5 ha (229 acres)|
|Average depth||6.5 ft (2.0 m)|
|Max. depth||11 ft (3.4 m)|
|Water volume||65,000,000 cu ft (1,800,000 m3)|
|Shore length1||6.4 km (4.0 mi)|
|Surface elevation||85 m (279 ft)|
|1 Shore length is not a well-defined measure.|
Castle Loch is a large, shallow, freshwater loch in Dumfries and Galloway, in the Southern Uplands of south-west Scotland. It lies to the west of Mochrum Loch and about 9 mi (14 km) west of the town of Wigtown. The loch has 2 islets.
- "Bathymetrical Survey of the Fresh-Water Lochs of Scotland, 1897-1909, Lochs of the Cree Basin". National Library of Scotland. National Library of Scotland. Retrieved 16 September 2015.
- "Castle loch". British lakes. British Lakes. Archived from the original on 30 January 2019. Retrieved 16 September 2015.
- "Lochs Castle & Mochrum (Vol. 5, Plate 41) - Bathymetrical Survey, 1897-1909 - National Library of Scotland". National Library of Scotland. Retrieved 16 September 2015.