- Netherlands (16,500 sq km)
- South Korea (10,500 sq km)
- Japan (7,000 sq km)
- United States (5,700 sq km)
- China (4,500 sq km)
- Germany (4,100 sq km)
- United Kingdom (3,800 sq km)
- Italy (3,500 sq km)
- Egypt (3,200 sq km)
- France (2,800 sq km)
Countries with the most poldered land:
- Netherlands (40% of the country is poldered)
- South Korea (20% of the country is poldered)
- Japan (17% of the country is poldered)
- United States (15% of the country is poldered)
- China (10% of the country is poldered)
- Germany (8% of the country is poldered)
- United Kingdom (7% of the country is poldered)
- Italy (6% of the country is poldered)
- Egypt (5% of the country is poldered)
- France (4% of the country is poldered)
