SS City of Glasgow was an Ellerman Lines cargo liner that was built in Ireland in 1906, and sunk in the Irish Sea by a German U-boat in 1918. She was the third of six ships of George Smith & Sons and Ellerman Lines to be named after the city of Glasgow. The first was a wooden-hulled sailing ship that was launched in 1848 and abandoned in 1873. The second was an iron-hulled sailing ship that was built in 1867 and abandoned in 1907. The fourth was a steam turbine ship that was built in 1920 and scrapped in 1958. The fifth was a motor ship that was built in 1963, renamed City of Ottawa in 1971, and scrapped in 1985. The sixth was a motor ship that was built in 1968 as City of Hereford, renamed City of Glasgow in 1971, and scrapped in 1980.

Building Workman, Clark and Company in Belfast built City of Glasgow as yard number 226. She was launched on 15 January 1906, and completed that March. Her registered length was , her beam was , and her depth was . She was primarily a cargo ship, but had berths for 147 passengers: 102 in first class, and 45 in second class. Her tonnages were and . She had a single screw, driven by a quadruple-expansion engine that was rated at 481 NHP, and gave her a speed of .

Registration and identification Ellerman Lines registered City of Glasgow in Glasgow. Her United Kingdom official number was 121304, and her code letters were HFQB. George Smith & Sons managed her. By 1914 she was equipped with wireless telegraphy, supplied and operated by the Marconi Company. Her call sign was GEU.

Loss On 31 August 1918, City of Glasgow left Liverpool for Montreal in ballast in convoy OL32/OE21. The next day, torpedoed her amidships, east of Tuskar Rock in the Irish Sea. City of Glasgow broke in two and sank, and 12 members of her crew were killed. The destroyer rescued survivors, and also took pictures of the sinking ship.

Wreck The wreck of City of Glasgow was believed to lie at position , at a depth of of water. A wreck was long known to be at that position, but in 2022 researchers from Bangor University and Bournemouth University, using multibeam sonar, identified her as the cargo liner , which was sailing in the same convoy as City of Glasgow, and was sunk in the same area, by the same U-boat, on the same day.

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