Which country in the world drinks the most? Moldova! Moldovans drink 4.8 gallons of alcohol per year, according to the World Health Organization. Russia and Eastern Europe are, in general, the heaviest drinking parts of the world, drinking more than 12.5 liters of alcohol per person per year. The United States falls into the 7.5 to 9.99 liters per person per year range. Also, not surprising but interesting all the same: Americans drink beer, while Russia and other Asian countries prefer spirits.