page_title: List of islands of County Mayo
section_title: Lough Mask
hierarchical_section_title: List of islands of County Mayo / Freshwater islands / Lough Mask
caption_attribution_description: English: Small bay on Lough Mask A picnic site and jetty give access to the lough at this point to the north of Toormakeady.
context_page_description: This articles lists the islands of County Mayo, the mainland of which is part of the island of Ireland. Included in this list are named offshore and freshwater islands as recorded by Ordnance Survey Ireland or the Placenames Database of Ireland. Additionally, areas of ecological significance related to both offshore and freshwater islands, designated by the National Parks and Wildlife Service, are also listed.
  Although County Mayo has hundreds of offshore and freshwater islands, only a handful of islands and island groups are large enough to be distinguishable on a typical map of the county, namely Achill Island, Clare Island and Inishturk, along with the island clusters of Duvillaun, Inishkea, Clew Bay and the major loughs. There are over 100 islands which are greater than 10 acres in area. The largest island is Achill, which extends to 148 km², making it Ireland's largest offshore island.
  Due to its abundance of bays, inlets and offshore islands, Mayo has the longest coastline of any county in Ireland, at 1,168 km or approximately 21% of the total coastline of the State. The geology and geomorphology of the county and its islands is among the most varied and complex in Ireland.
context_section_description: Aghinish
  Bed Island
  Bilberry Island
  Black Island
  Black Island
  Board Island
  Carrigeen Island
  Carrigeen Middle
  Carrigeenabreana
  Carrigeenagur Island
  Carrigeenamore
  Carrigeenavilla
  Carrigeenaweelaun
  Carrigeenbaun
  Carrigeenbunnahown
  Carrigeendany Islands
  Carrigeenduree
  Carrigeenfair Island
  Carrigeenkeelagh
  Carrigeenmauntrasna
  Carrigeennagool
  Carrigeennalogh
  Carrigeennasassonagh
  Carrigeenowen
  Carrigeenshangorman
  Castle Hag
  Cow Island
  Dash Island
  Devenish Island
  Doran Islands
  Goat Island
  Green Island
  Gull Island
  Flag Island
  Heath Island
  Illan Columbkille
  Illanboe Beg
  Illanboe More
  Illandawaur
  Ingon Island
  Inishangan
  Inishdurra
  Inishgleasty
  Inishoght
  Inishowenlackboy
  Inishrobe
  Kid Island
  Lackboy
  Lamb Island
  Long Island
  Long Islands
  Lusteen Beg
  Lusteen More
  Nut Island
  Oak Island
  Pig Island
  Rams Island
  Rialisk
  Ringolden
  River Island
  Saints Island
  Seerillaun
  Shangorman
  Shrub Island
  Thick Island
  Whiteland Island
caption: Lough Mask
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