Union County Population 2017

Union County's estimated population is 555,630 with a growth rate of 0.48% in the past year according to the most recent United States census data. Union County is the 7th largest county in New Jersey.

Year Population Growth Growth Rate
2016555,6302,6810.48%
2015552,9491,9250.35%
2014551,0242,9120.53%
2013548,1123,6470.67%
2012544,4653,9780.74%
2011540,4872,7670.51%
2010537,72043,9018.89%
1990493,819-10,275-2.04%
1980504,094-39,022-7.18%
1970543,11638,8617.71%
1960504,255106,11726.65%
1950398,13869,79421.26%
1940328,34423,1357.58%
1930305,209105,05252.48%
1920200,15759,96042.77%
1910140,19740,84441.11%
190099,35326,88637.10%
189072,46716,89630.40%
188055,57113,71232.76%
187041,85914,07950.68%
186027,7800.00%

Union County Population Growth

Population Data via

Union County Race Data

Race Population Percentage
White376,95367.84%
Black or African American130,89723.56%
Asian29,5965.33%
Two or More Races11,1052.00%
American Indian and Alaska Native3,8320.69%
Native Hawaiian and Other Pacific Islander5660.10%

Union County Population Pyramid

0k5k10k15k20kUnion County Male Population0k5k10k15k20kUnion County Female Population

Population of Cities in Union County

City 2010 Census 2016 Estimated Growth Growth Rate
Elizabeth12496912864036712.94%
Plainfield49699506369371.89%
Linden405154245719424.79%
Westfield3031630206-110-0.36%
Rahway273372945121147.73%
Summit21462220195572.60%
Roselle21085216255402.56%
Roselle Park13292136383462.60%
New Providence12187127585714.69%
Kenilworth791481942803.54%
Fanwood731477003865.28%
Mountainside668168832023.02%
Garwood422643471212.86%
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