|Old Norse name||Baltey|
|OS grid reference|
|Area||80 ha (198 acres)|
|Area rank||162 |
|Highest elevation||44 m (144 ft)|
|Sovereign state||United Kingdom|
|Council area||Shetland Islands|
|Balta Sound Lighthouse|
|Construction||metal skeletal tower (current)|
concrete tower (first)
|Height||6.5 metres (21 ft)|
|Shape||quadrangular tower covered by aluminium panels with light on the top (current)|
cylindrical tower with balcony and lantern (first)
|Power source||solar power|
|First lit||2004 (current)|
|Focal height||17 metres (56 ft)|
|Range||white: 10 nautical miles (19 km; 12 mi)|
red: 7 nautical miles (13 km; 8.1 mi) 
|Characteristic||Fl WR 10s.|
There is a natural arch on the eastern side of the island.
Balta Island Seafare and Skaw Smolts are the most northerly fish farm and fish hatchery in Britain.
The Balta Light, at the southern tip of the island was one of the first concrete structures in Shetland. The lighthouse was designed by David Stevenson and built in 1895. It was demolished in 2003 and replaced by a small solar-powered light.
- Area and population ranks: there are c. 300 islands over 20 ha in extent and 93 permanently inhabited islands were listed in the 2011 census.
- National Records of Scotland (15 August 2013). "Appendix 2: Population and households on Scotland's Inhabited Islands" (PDF). Statistical Bulletin: 2011 Census: First Results on Population and Household Estimates for Scotland Release 1C (Part Two) (PDF) (Report). SG/2013/126. Retrieved 14 August 2020.
- Haswell-Smith, Hamish (2004). The Scottish Islands. Edinburgh: Canongate. ISBN 978-1-84195-454-7.
- Ordnance Survey. "Sheet 1 - Shetland Islands (Yell & Unst) - Ordnance Survey One-inch to the mile maps of Great Britain, Seventh Series, 1952-1961". National Library of Scotland. National Library of Scotland. Retrieved 23 January 2016.
- Anderson, Joseph (ed.) (1873) The Orkneyinga Saga. Translated by Jón A. Hjaltalin & Gilbert Goudie. Edinburgh. Edmonston and Douglas. The Internet Archive. Retrieved 26 August 2013.
- Balta Sound Light Lighthouses Explorer. Retrieved 30 May 2016
- Rowlett, Russ. "Lighthouses of Scotland: Shetland". The Lighthouse Directory. University of North Carolina at Chapel Hill. Retrieved 30 May 2016.
- "Balta Island Seafare". Archived from the original on 18 February 2008. Retrieved 5 January 2008.
- Derek Flinn (1981). "John MacCulloch, MD, FRS and his Geological Map of Scotland: His Years in the Ordnance. 1795–1826". Notes and Records of the Royal Society of London. London: The Royal Society. 36 (1): 91. doi:10.1098/rsnr.1981.0006. JSTOR 531659. PMID 11610947. S2CID 27602718.
- Marter, Hans J. (10 November 2003). "Historic lighthouse to go". shetland-news.co.uk/Wayback Machine. Archived from the original on 27 September 2007. Retrieved 15 October 2013.