Pacific Island Nations (e.g., Nauru, Tonga, Cook Islands)
These small island countries consistently report the world’s highest childhood obesity rates. The problem stems from dramatic shifts in diet over recent decades, as imported processed foods rich in sugar and fat have replaced traditional local staples. Combined with reduced physical activity, this has led to a childhood obesity crisis that is especially severe among young people.
United States
The U.S. has one of the highest rates of childhood obesity among developed nations. Factors include widespread availability of calorie-dense, processed foods, limited access to healthy food in some communities, and increasingly sedentary lifestyles due to screen time. Many children do not get enough physical activity at school or at home, further compounding the issue.
China
China’s rapid economic growth has brought about dramatic lifestyle changes, including a greater reliance on fast food and a reduction in active play for children. Over just a couple of decades, the country has seen a sharp rise in childhood obesity rates, especially in urban areas where sedentary habits are more common.
Japan
Japan stands out for its exceptionally low rates of childhood obesity. This is largely due to cultural norms around healthy eating, balanced school lunches, and daily physical activity. Japanese children learn about nutrition from an early age, and meals emphasize vegetables, fish, and moderate portions.
India
India’s childhood obesity rates remain low compared to much of the world, though they are rising in some urban areas. The majority of children still consume home-cooked meals made from whole grains, legumes, and vegetables. For most families, processed foods and sugary snacks are not daily staples.
Vietnam
Vietnam maintains some of the lowest rates of childhood obesity in the world. Diets here are typically rich in fresh vegetables and lean proteins, with limited intake of processed or sugary foods. Food insecurity in some regions also keeps rates of overweight and obesity low.
Sub‑Saharan African Nations (e.g., Ethiopia, Rwanda, Madagascar)
In much of sub-Saharan Africa, childhood obesity is rare and undernutrition is a more pressing concern. Traditional diets center around grains, beans, and vegetables, and there is little access to high-calorie processed foods. Physical activity is also a normal part of daily life for most children.
Nepal
Nepal reports very low levels of childhood obesity, reflecting dietary habits built around rice, lentils, and fresh vegetables. Limited exposure to processed snacks and sugary drinks, especially in rural areas, keeps obesity rates among children far lower than in more industrialized nations.
