Clew Bay (; ) is a large ocean bay on the Atlantic coast of County Mayo, Ireland. It is roughly rectangular and has more than a hundred small islands on its landward side; Ireland's best example of sunken drumlins. The larger Clare Island guards the entrance of the bay.
The bay is overlooked by Croagh Patrick to the south and the Nephin Beg Mountains to the north. From the southwest part of the bay eastwards are the settlements Louisburgh, Lecanvey, Murrisk, and Westport; north of Westport is Newport, and westwards from there lies Mulranny, gateway to Achill.
Another old name is Cuan Umhaill ("harbour of Umhaill"). It was rendered in English as "Bay of the Owly" and "Bay of the Owles." Other English names were the Bay of Borace, Horrus, and Baragh, all references to Burrishoole ( Buiríos Umhaill). The name 'Clew Bay', of uncertain origin, first appears in a 1714 map; it may be derived from cliath, "hurdle".
Clew Bay was the heart of the Gaelic Ireland territory of Umhaill, ruled by the Uí Máille (O'Malleys). Umhaill's last and most famous ruler was Grace O'Malley (Gráinne Ní Mháille), nicknamed "the pirate queen". The O'Malleys had a fleet of ships and several castles around Clew Bay, including Carrickkildavnet Castle, Rockfleet Castle and Granuaile's Castle.
During the Irish Civil War in July 1922, 400 Free State troops were landed at Clew Bay to take Westport and Castlebar from Anti-Treaty forces.
In 2024, the discovery of a submerged late Bronze Age fort from the depths of Clew Bay was announced by a team from Connemara and Mayo County Council.
Legend has it that Clew Bay has 365 islands in it—"an island for every day of the year". The large number of drumlins at the east end of the bay gave rise to this myth, but in fact there are not so many.
86 | 87 | 88 | 89 | 90 | 91 | 92 | 93 | 94 | 95 | 96 | |
96 | Inishkeel | Inishbobunnan (Unnamed) | Beetle Island North Inishlim | ||||||||
95 | Moynish More | Black Rock Inisherkin | Inishgowla Beetle Island South Inishnacross | Inishtubrid | Inishquirk | Illannambraher | Roslynagh | Gobfadda Kid Island East | Forillan Illanavrick Camel Island | ||
94 | Moynish Beg | Inishcooa Roeillaun | Inishdeashmore Inishdeashbeg | Inishilra Inishcarrick Inishcorky | Inishdasky Inishcoragh (Unnamed) | Freaghillanluggagh | Inishdaweel Muckinish Illanascraw | Inishturlin | Rabbit Island | ||
93 | Inishcannon | Inisheanmore Rock Carrickachorra Carricklahan | Freaghillan West Inishkee | Freaghillan East Inishcuill West Inishfesh | Inishcuill Carrickwee | Rosbarnagh Island Carrigeennaronty | |||||
92 | Inishoo | Illanmaw Inishgowla | Mauherillan Inishlaughil | Inishmolt Inishbollog | Inishdaff | Inishloy | |||||
91 | Inishbee | Calf Island Derrinish | Inishcottle | Illannaconney Inishnakillew | Inishturk Beg | ||||||
90 | Rabbit Island | Knocky-Cahillaun Quinnsheen Island | Freaghillan Moneybeg Island Clynish Illaunnamona | Carrigeenglass North Trawbaun Carrigeenglass | Atticlea Island | ||||||
89 | Island More | Collan Beg | Collan More Carrigeenglass South | ||||||||
88 | Inishgort | Inishlyre | |||||||||
87 | Dorinish More | Inishlaghan | Crovinish Carrickwee | Illanataggart Rocky Island | |||||||
86 | Creggandillisk | Dorinish Beg Inishimmel | Inishleague | Inishgowla South Inishraher | Forillan Carrickawart Island Finnaun Island | Stony Island | Cleavlagh Strand | ||||
85 | Carrickataha | Bartraw Inishdaugh | Inisheeny | Corillan Carricknamore | Green Islands | Carricknacaly | Monkellys Rocks Inishweela Illanroe | ||||
84 | Cahernaran Island | Annagh Island West Sruffanbaun Strand | Annagh Island East Illanatee | ||||||||
83 | Annagh Island Middle Roeillan | ||||||||||
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