SS Lochness was a David MacBrayne Ltd mail steamer launched in 1929.

SS Lochness was a mail steamer, built by Harland and Wolff, Govan, the first of four new vessels built under the terms of the constitution of the new company, David MacBrayne (1928) Ltd.[4] She was the third vessel to carry the name and the last steamship ordered by MacBrayne's.

[5] Launched on 6 June 1929,[1] she ran trials on 9 July and gave her first public service, to Tarbert, Loch Fyne, during Glasgow Fair Holiday.

With the introduction of Claymore in 1955, Lochness became redundant and was sold to Italian owners.

[7] Lochness was built for the Mallaig - Kyle - Stornoway route, to replace SS Sheila which had been wrecked in 1927.