Other national surveys. 1  In 2015, the National Survey on Drug Use and Health reported that 20% of youth aged 12 to 20 years drink alcohol and 13% reported binge drinking in the past 30 days.8.
Mercer Island, WA Population and Races. As of 2010-2014, the total population of Mercer Island is 23,636, which is 7.26% more than it was in 2000. The population growth rate is much lower than the state average rate of 17.05% and is lower than the national average rate of 11.61%.
Population of Mercer County. Last official estimated population of Mercer County was 368,043 (year 2014)[1]. This was 0.115% of total US population and 4.1% of total New Jersey state population. Area of Mercer County is 228.9 miÂ² (=592.8 kmÂ²), in this year population density was 1,607.96 p/miÂ². If population growth rate would be same as in period 2010-2014 (+0.1%/yr), Mercer County population in 2017 would be 369,195 .