Per 2013 census, Western region was the most populated with a population of 699,704, while Lower River was the least populated with 82,361. The maximum density of population was seen in Western with 396.59 persons per km2, while it was lowest in Lower River with 50.90 persons per km2. The maximum number of households was in Western region with 45,396 households as of 2003. Lower River had the highest infant mortality rate of 96 for every thousand births and under-five mortality of 137 per every thousand births. The poverty gap ratio was maximum in Central River with 36.45 per cent as of 2003 and lowest in Lower River with 19.80 per cent.