Islands of Palmeria,Tino and Tinetto

Schlisselburg

Castle Island Fortifications

Stralsund: "Unique in Stralsund is the island location, unchanged since the 13th century, between the Strelasund and the ponds on the land side, which were dammed soon after the town was founded."

Trosso Island, and many fortified islands including Kungsholms Fort in Kralskrona archipelago

The inscribed area of Akko extends into the sea and includes the small island in the harbour on which the "Tower of Flies"/El Manara Lighthouse was built (see top centre of introductory photo on this site)
See en.wikipedia.org

The inscribed area of Rio contains 2 islands fully within it: a. Ilha da Laje (or "Slab" island) b. Ilha de Cotunduba

Pampus Island

"Together with a great many bolons or brackish channels,they form a dense network encompassing over 200 main islands and islets" (AB eval)

The whole of Artok Island

The 7 components include Kunta Kinteh Island, an island in the Gambia River

Lokrum

Suvarnadurg and Sindhudurg Forts

The map of this site in the AB review seems to show that the entire island of Bjorko is inscribed.

Okinoshima Island is fully included (except for the landing pier)

Pfalzgrafenstein island castle
See en.wikipedia.org

Ortygia

Speicherstadt covers several islands

Among several completely inscribed islands is Saddle Island which contains the "Try-works" (furnaces for rendering whale oil from blubber) of the whaling station and other cultural remains.

3 small offshore islands associated with the Birdman cult - Mota Nui, Motu Iti and Moto Kau Kau

Kampa Island

Berlin Pfaueninsel

Ile de la cite and Ile de Saint Louis

Philae Temple Island

on a series of 99 artificial islets (AB ev)

Ile d'Essouaria containing the prison - offshore from the Medina.

It also integrates early parts of a Volga Bolgar settlement located ... on the closest Volga island. (AB ev)

Cockatoo Island

Nipisat Island

The Centre of Bamberg occupies an entire island between 2 branches of the river Regnitz. Furthermore - the Town Hall is situated on and occupies an ENTIRE different island ON ITS OWN!

Illa d'en Colom (Nomination file, p. 160)

Schwerin Castle is situated on Schlossinsel. (wiki)

this applies to the second biggest island of Sola plus the many smaller islands and skerries rather than to Vega itself.