Mercer County Population 2017

Mercer County's estimated population is 371,023 with a growth rate of -0.05% 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
2016371,023-176-0.05%
2015371,199-489-0.13%
2014371,6881820.05%
2013371,5061,4190.38%
2012370,0872,0430.56%
2011368,044470.01%
2010367,99742,17312.94%
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
White240,32064.77%
Black or African American79,46621.42%
Asian39,94010.76%
Two or More Races8,4622.28%
American Indian and Alaska Native2,2470.61%
Native Hawaiian and Other Pacific Islander7640.21%

Mercer County Population Pyramid

0k5k10k15kMercer County Male Population0k5k10k15kMercer County Female Population

Population of Cities in Mercer County

City 2010 Census 2016 Estimated Growth Growth Rate
Trenton8493784056-881-1.04%
Princeton285953124926549.28%
Hightstown55095503-6-0.11%
Pennington25712568-3-0.12%
Hopewell19321926-6-0.31%
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