The IJmeer is a 'bordering lake' (Randmeer) in the Netherlands straddling the provinces of North Holland and Flevoland.

[3] The IJmeer is bordered, and separated from the IJ, by the Oranje Locks to the east, a straight line extending from Uitdam to the Almere-Pampus to the northeast, and the Hollandse Brug to the southeast, where it connects with the Gooimeer.

On 24 November 2004 the Council of State ruled that the construction of further new islands was provisionally banned, because the consequences for the environment were insufficiently researched.

In 2006, the Council for Transport and Public Works and the Environment Board issued a joint opinion stating that Amsterdam and Almere should become conjoined cities with the IJmeer as a 'Central Park'.

Most likely this connection will be a bridge with lanes for public transport (metro and RER-like) and road.