Most Obese Countries 2025. According to the collected data, the ten countries with the highest rates of obesity among adults are nauru, cook islands, palau, marshall islands, tuvalu, niue, tonga, samoa, kiribati, and micronesia. The data shows one in six europeans with obese and over 50% of adults overweight.

The data shows one in six europeans with obese and over 50% of adults overweight. According to the collected data, the ten countries with the highest rates of obesity among adults are nauru, cook islands, palau, marshall islands, tuvalu, niue, tonga, samoa, kiribati, and micronesia.