List of islands by name (O)

This article features a list of islands sorted by their name beginning with the letter O.

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O

Island’s Name	Island group(s)	Country/Countries
Oahu
Oak	Georgian Bay (Parry Sound)
Óbudai-sziget	Danube River
Obstruction	San Juan Islands,
Oconnel	Mississippi River,
Ocracoke
Oeno		British overseas territories
Ofidoussa
Ogami	Miyako Islands part of the Ryūkyū proper part of the Nansei Islands
Oinousses
Oki daitō	Daitō Islands part of the Okinawa Islands part of the Ryūkyū proper part of the Nansei Islands
Okikendawt	French River
Okinawa	Okinawa Islands part of the Ryūkyū proper part of the Nansei Islands
Okinoerabujima	Amami Islands part of the Ryūkyū proper part of the Nansei Islands
Oland	North Frisian Islands
Öland
Oleron
Olib	Northern Dalmatia
Ombo	Ryfylke Islands, Rogaland
Omelek	Kwajalein Atoll, Ralik Chain
Omø	Great Belt
Omolkarm	Persian Gulf
Ono	Perdito River,
Ontong Java	Solomon Islands
Orcas	San Juan Islands,
Öreg-sziget	Danube River
Orfasay
Oronsay	Inner Hebrides
Orust
Izu Ōshima	Izu Islands
Osmussaar
Ostrów	Islands of Gdańsk
Othonoi	Ionian Islands
Otok	Bay of Kotor Islands
Out Stack
Outer Duck	Lake Huron,
Ovau	Shortland Islands
Ovoa	Beira Litoral Islands
Oxeia	Ionian Islands
Oxna
Owens	Ohio River,
Owl
Oyster Rock	Maharashtra