Mercer County Population 2018

Mercer County's estimated population is 374,733 with a growth rate of 0.29% in the past year according to the most recent United States census data. Mercer County is the 12th largest county in New Jersey.

Year Population Growth Growth Rate
2017374,7331,0730.29%
2016373,6605560.15%
2015373,1041300.03%
2014372,9746370.17%
2013372,3371,9180.52%
2012370,4192,2180.60%
2011368,2012710.07%
2010367,93042,10612.92%
1990325,82417,9615.83%
1980307,8633,8951.28%
1970303,96837,57614.11%
1960266,39236,61115.93%
1950229,78132,46316.45%
1940197,31810,1755.44%
1930187,14327,26217.05%
1920159,88134,22427.24%
1910125,65730,29231.76%
190095,36515,38719.24%
189079,97821,91737.75%
188058,06111,67525.17%
187046,3868,96723.96%
186037,4199,42733.68%
185027,9926,49030.18%
184021,5020.00%

Mercer County Population Growth

Population Data via

Mercer County Race Data

Race Population Percentage
White240,32064.13%
Black or African American79,46621.21%
Asian39,94010.66%
Two or More Races8,4622.26%
American Indian and Alaska Native2,2470.60%
Native Hawaiian and Other Pacific Islander7640.20%

Mercer County Population Pyramid

0k5k10k15k Male Population0k5k10k15k Female Population8580757065605550454035302520151050
Data Sources
  1. US Census City/Town Population estimates - Most recent state estimates from the Census Bureau's Population Estimates Program
  2. Population of States and Counties of the United States: 1790 - 1990