Cacho Island (Bulgarian: остров Качо, romanized: ostrov Cacho, IPA: [ˈɔstrof ˈkat͡ʃo]) is the conspicuous 250 m long in east–west direction and 100 m wide rocky island separated by a 160 m wide passage from Aktinia Beach on the southwest coast of Snow Island in the South Shetland Islands. Surface area 1.63 ha. The area was visited by early 19th century sealers.

The feature is named after the Spanish physicist, polar explorer and author Javier Cacho Gómez, participant in the 1986/87 Spanish Antarctic expedition and base commander at Juan Carlos I base in subsequent seasons, for his contribution to the promotion of Antarctica and support for the Bulgarian Antarctic programme.

Cacho Island is located at 62°49′57.4″S 61°28′35″W / 62.832611°S 61.47639°W / -62.832611; -61.47639, which is 315 m south of Rebrovo Point and 2.5 km west-northwest of Cape Conway. Bulgarian mapping in 2009.

• South Shetland Islands. Scale 1:200000 topographic map. DOS 610 Sheet W 62 60. Tolworth, UK, 1968
• L. Ivanov. Antarctica: Livingston Island and Greenwich, Robert, Snow and Smith Islands. Scale 1:120000 topographic map. Troyan: Manfred Wörner Foundation, 2010. ISBN 978-954-92032-9-5 (First edition 2009. ISBN 978-954-92032-6-4)
• Antarctic Digital Database (ADD). Scale 1:250000 topographic map of Antarctica. Scientific Committee on Antarctic Research (SCAR). Since 1993, regularly upgraded and updated

• List of Antarctic and subantarctic islands

• Cacho Island. SCAR Composite Gazetteer of Antarctica
• Bulgarian Antarctic Gazetteer. Antarctic Place-names Commission. (details in Bulgarian, basic data in English)

• Cacho Island. Adjusted Copernix satellite image

This article includes information from the Antarctic Place-names Commission of Bulgaria which is used with permission.