The Flevopolder is an island polder forming the bulk of Flevoland, a province of the Netherlands. Created by land reclamation, its northeastern part was drained in 1955 and the remainder—the southwest—in 1968.
Unlike other major polders, it is surrounded by lakes and below-sea-level channels. By some definitions, it is the world's largest artificial island. Levees, dikes, and pumping were used to drain the land. The polder's name references the ancient Lake Flevo. The Flevopolder, along with the Noordoostpolder, forms the Flevoland province, which is located near Amsterdam in the southwest and Kampen, Overijssel in the northeast.
Levees and dikes were first built around the polder. However, unlike similar projects, the internal water was then drained by diesel and electric pumps.
The Flevopolder together with the Noordoostpolder forms the province of Flevoland, the most recent province to be added to the Netherlands. Its southwestern point is close to Amsterdam and its opposite end is close to Kampen, Overijssel. It has three highly dominant settlements in terms of distribution of population.