is the largest of the islands. It enjoys a showpiece location viewed from the Old Town, Wały Chrobrego Embankment and inbound roads leading to the city, primarily the Long Bridge and the Castle Route. It has favourable location with direct access to quays on Oder and its branches. It is linked with the City Centre via the Long Bridge.

Port and shipyard quays are favourably located promoting the development of industry. This actually contributed to the current image of a port city. On the island, preserved are individual building and clusters of buildings listed in the conservation register. These include the old abattoir, Customs Office at Energetyków Street, St Gertrud Church at St Florian Street, industrial and warehouse complex of Fish Company, and a tenement house at Gdański Bulwar.

The total area is about 50 ha.

Major designations at Łasztownia include commerce, namely retail, services, offices, city services of administration, finance, culture, education and specialist healthcare, as well as hotels, sports, recreation and tourism utilising access to water. In the future, it is planned to connect the northern part of Łasztownia with the neighbouring Grodzka Island.