RMS Peninnis — operated by the ISSC 1920–1927.

MV Ganilly — operated by the ISSC 1923–1932.
Built in 1923 by H W Dockyard, Plymouth.
Sold to Coast Lines Ltd in 1932 and scrapped in 1937.

SS Gugh — operated by the ISSC 1923–1951.
Built in 1910 by Philip and Sons, formerly the steamer Dart.
Converted to diesel in 1927.
Wrecked in 1951.

SS Scillonian, operated by the ISSC 1926–1956.

SS Advance
SS Endeavour
MV Endeavour
MV NorNour
TSMV Lady of the Isles — operated by the ISSC 1947–1952.
Sold to a French owner.

Gondolier — operated by the ISSC ??–
1967.

Lyonnesse — operated by the ISSC ??–
1967.

Golden Spray III — operated by the ISSC 1947–1968.
Now operated by the St. Mary's Boatman's Association.

MV Kittern — operated by the ISSC 1949–??.
Built in 1944 by Fox and Son, Ipswich.
An ex Royal Navy Motor Launch.

MV Tean — operated by the ISSC 1953–1980s?
An ex Royal Navy Motor Launch built at Bangor in 1941.
Length 53 feet (16 m).
Gross tonnage 20.65.
Registered tonnage 9.30.

TSMV Scillonian II — operated by the ISSC 1956–1977.

MV Gugh — operated by the ISSC 1961–1991.
An ex Royal Navy Motor Launch built at Rowhedge.
Formerly MV Fervent.
Was replaced by the current Lyonesse Lady.

TSMV Queen of the Isles – operated by the ISSC 1964–1966.

Ivor B — cargo vessel.
Acquired by the ISSC in 2010, formerly Guedel and in French service, formerly serving islands off the coast of Brittany.
Is 32 metres long and capable of carrying around 280 tonnes of cargo.
Named after the late Ivor Bone, a building contractor manager during the construction of the new Five Islands School.
Sold in 2012 and subsequently renamed Evora.

Mali Rose — cargo vessel built in Norway in 1992 and sailed the fjords with fish meal as the main cargo.
Acquired in 2016 by the steamship company to replace the Gry Maritha.
A series of mishaps and conversions meant the vessel finally made her inaugural trial sailing on 17 July 2017 and provided a sporadic service before making her final  voyage on 9 May 2019.
Sold on 19 December 2019 to an unreported buyer from Norway for an undisclosed price.
It is believed the ship has been renamed Skylus.
RMS Peninnis — operated by the ISSC 1920–1927.
MV Ganilly — operated by the ISSC 1923–1932. Built in 1923 by H W Dockyard, Plymouth. Sold to Coast Lines Ltd in 1932 and scrapped in 1937.
SS Gugh — operated by the ISSC 1923–1951. Built in 1910 by Philip and Sons, formerly the steamer Dart. Converted to diesel in 1927. Wrecked in 1951.
SS Scillonian, operated by the ISSC 1926–1956.
SS Advance
SS Endeavour
MV Endeavour
MV NorNour
TSMV Lady of the Isles — operated by the ISSC 1947–1952. Sold to a French owner.
Gondolier — operated by the ISSC ??–1967.
Lyonnesse — operated by the ISSC ??– 1967.
Golden Spray III — operated by the ISSC 1947–1968. Now operated by the St. Mary's Boatman's Association.
MV Kittern — operated by the ISSC 1949–??. Built in 1944 by Fox and Son, Ipswich. An ex Royal Navy Motor Launch.
MV Tean — operated by the ISSC 1953–1980s? An ex Royal Navy Motor Launch built at Bangor in 1941. Length 53 feet (16 m). Gross tonnage 20.65. Registered tonnage 9.30.
TSMV Scillonian II — operated by the ISSC 1956–1977.
MV Gugh — operated by the ISSC 1961–1991. An ex Royal Navy Motor Launch built at Rowhedge. Formerly MV Fervent. Was replaced by the current Lyonesse Lady.
TSMV Queen of the Isles – operated by the ISSC 1964–1966.
Ivor B — cargo vessel. Acquired by the ISSC in 2010, formerly Guedel and in French service, formerly serving islands off the coast of Brittany. Is 32 metres long and capable of carrying around 280 tonnes of cargo. Named after the late Ivor Bone, a building contractor manager during the construction of the new Five Islands School. Sold in 2012 and subsequently renamed Evora.
Mali Rose — cargo vessel built in Norway in 1992 and sailed the fjords with fish meal as the main cargo. Acquired in 2016 by the steamship company to replace the Gry Maritha. A series of mishaps and conversions meant the vessel finally made her inaugural trial sailing on 17 July 2017 and provided a sporadic service before making her final  voyage on 9 May 2019. Sold on 19 December 2019 to an unreported buyer from Norway for an undisclosed price. It is believed the ship has been renamed Skylus.
Isles of Scilly Steamship Company