IJsselmonde is an island between the rivers Nieuwe Maas, Noord, and Oude Maas in the province of Zuid Holland in the Netherlands. The city of Rotterdam now occupies most of the northern part of the island, this includes the former village of IJsselmonde, once a separate community. The island was once a rich agricultural region, but is mostly suburbia today.

IJsselmonde consists of the following municipalities:

• Albrandswaard
• Barendrecht
• Hendrik-Ido-Ambacht
• Ridderkerk
• Rotterdam (southern part)
• Zwijndrecht

IJsselmonde is separated:

• from the mainland on the north by the Nieuwe Maas
• from Voorne-Putten on the west by the Oude Maas
• from Hoekse Waard on the south by the Oude Maas
• from Dordrecht island on the southeast by the Oude Maas
• from the Alblasserwaard mainland on the east by the Noord river

For the connections, see these waterways.