''SS Douglas'' may refer to the following four ships:
* : a paddle-steamer of the Isle of Man Steam Packet Company which subsequently became a blockade runner for the Confederate Navy during the American Civil War under the name ''Margaret & Jessie,'' before being taken as "''prize''" and serving in the Union Navy as the USS ''Gettysburg.''
* : the second steamer in the fleet of the Isle of Man Steam Packet Company to bear the name.
* : originally a packet steamer of the London and Southwestern Railway named ''Dora.'' Acquired by the Isle of Man Steam Packet Company in 1901 and re-named Douglas.
* : a freight vessel built for the Clyde Shipbuilding and Engineering in Port Glasgow for Goole Steam Shipping Company.
{{DEFAULTSORT:Douglas
Ship names