SS Clan Macalister was a Clan Line heavy-lift cargo liner. She was launched in 1930 in Scotland and sunk by enemy aircraft during the Dunkirk evacuation in 1940 with the loss of 18 of her crew. She was the largest ship to take part in the Dunkirk evacuation. She was the third Clan Line ship to be called Clan Macalister. The first was a steamship built in 1891 and sold to Furness, Withy in 1902. The second was a steamship built in 1903 and sunk by a U-boat in 1915.