Mercer County, New Jersey demographics
Population: 384,951
Median age: 38.9
Median household income: 85,687
Demographics, population, home values, social and economic characteristics of Mercer County, New Jersey.
Population
| 2021 | 384,951 |
| 2020 | 368,085 |
| 2019 | 367,922 |
| 2018 | 368,762 |
| 2017 | 373,362 |
| 2016 | 371,101 |
| 2015 | 370,212 |
| 2014 | 369,526 |
| 2013 | 368,094 |
| 2012 | 366,442 |
| 2011 | 365,318 |
| 2010 | 364,445 |
| 2009 | 363,778 |
Mercer County, NJ cities
Groveville CDP - 3,257
Hamilton Square CDP - 12,244
Hightstown borough - 5,855
Hopewell borough - 1,841
Lawrenceville CDP - 3,661
Mercerville CDP - 14,234
Pennington borough - 2,777
Princeton borough - 30,717
Princeton Junction CDP - 2,208
Trenton city - 90,097
Twin Rivers CDP - 8,049
White Horse CDP - 9,710
Yardville CDP - 6,242
Census data for Mercer County, New Jersey
Demographic and housing estimates in Mercer County, New Jersey
| Total population | 384,951 |
| Male | 189,341 |
| Female | 195,610 |
| Total population | 384,951 |
| Under 5 years | 21,331 |
| 5 to 9 years | 22,063 |
| 10 to 14 years | 24,453 |
| 15 to 19 years | 28,563 |
| 20 to 24 years | 29,095 |
| 25 to 34 years | 47,238 |
| 35 to 44 years | 49,161 |
| 45 to 54 years | 53,065 |
| 55 to 59 years | 26,154 |
| 60 to 64 years | 24,906 |
| 65 to 74 years | 34,067 |
| 75 to 84 years | 17,110 |
| 85 years and over | 7,745 |
| Median age (years) | 38.9 |
| Under 18 years | 82,661 |
| 16 years and over | 312,266 |
| 18 years and over | 302,290 |
| 21 years and over | 282,804 |
| 62 years and over | 72,775 |
| 65 years and over | 58,922 |
| Total population | 384,951 |
| One race | 363,968 |
| White | 220,833 |
| Black or African American | 77,228 |
| American Indian and Alaska Native | 849 |
| Asian | 45,418 |
| Native Hawaiian and Other Pacific Islander | 118 |
| Some other race | 19,522 |
| Two or more races | 20,983 |
| Citizen, VOTING AGE 18 and over population | 261,228 |
| Male Citizen, VOTING AGE 18 and over population | 125,427 |
| Female Citizen, VOTING AGE 18 and over population | 135,801 |
Social characteristics in Mercer County, New Jersey
| Total households | 137,114 |
| Family households (families) | 65,624 |
| Married-couple family | 6,201 |
| Male householder, no wife present, family | 23,344 |
| Female householder, no husband present, family | 16,056 |
| Nonfamily households | 41,945 |
| Average household size | 42,596 |
| Average family size | 2.68 |
Economic characteristics in Mercer County, New Jersey
| Total households | 137,114 |
| Less than $10,000 | 7,853 |
| $10,000 to $14,999 | 5,243 |
| $15,000 to $24,999 | 8,780 |
| $25,000 to $34,999 | 8,388 |
| $35,000 to $49,999 | 11,593 |
| $50,000 to $74,999 | 18,437 |
| $75,000 to $99,999 | 17,175 |
| $100,000 to $149,999 | 23,513 |
| $150,000 to $199,999 | 14,084 |
| $200,000 or more | 22,048 |
| Median household income (dollars) | 85,687 |
Housing characteristics in Mercer County, New Jersey
| Total housing units | 149,573 |
| Occupied housing units | 137,114 |
| Vacant housing units | 12,459 |
| Total housing units | 149,573 |
| 1-unit, detached | 71,779 |
| 1-unit, attached | 31,403 |
| 2 units | 6,744 |
| 3 or 4 units | 5,942 |
| 5 to 9 units | 6,085 |
| 10 to 19 units | 12,121 |
| 20 or more units | 14,801 |
| Mobile home | 648 |
| Boat, RV, van, etc. | 50 |
| Total housing units | 149,573 |
| Built 2014 or later | 60 |
| Built 2010 to 2013 | 5,964 |
| Built 2000 to 2009 | 11,391 |
| Built 1990 to 1999 | 12,381 |
| Built 1980 to 1989 | 17,607 |
| Built 1970 to 1979 | 16,724 |
| Built 1960 to 1969 | 19,693 |
| Built 1950 to 1959 | 23,632 |
| Built 1940 to 1949 | 10,397 |
| Built 1939 or earlier | 31,724 |
| Total housing units | 149,573 |
| 1 room | 3,852 |
| 2 rooms | 2,880 |
| 3 rooms | 12,714 |
| 4 rooms | 22,734 |
| 5 rooms | 22,611 |
| 6 rooms | 25,895 |
| 7 rooms | 20,133 |
| 8 rooms | 17,320 |
| 9 rooms or more | 21,434 |
| Median rooms | 5.9 |
| Total housing units | 149,573 |
| No bedroom | 4,205 |
| 1 bedroom | 19,568 |
| 2 bedrooms | 37,029 |
| 3 bedrooms | 48,604 |
| 4 bedrooms | 31,428 |
| 5 or more bedrooms | 8,739 |
| Occupied housing units | 137,114 |
| Owner-occupied | 86,404 |
| Renter-occupied | 50,710 |
| Average household size of owner-occupied unit | 2.79 |
| Average household size of renter-occupied unit | 2.48 |
| Occupied housing units | 137,114 |
| Moved in 2017 or later | 10,918 |
| Moved in 2015 to 2016 | 36,816 |
| Moved in 2010 to 2014 | 21,635 |
| Moved in 2000 to 2009 | 31,315 |
| Moved in 1990 to 1999 | 16,465 |
| Moved in 1989 and earlier | 19,965 |
| Owner-occupied units | 86,404 |
| Less than $50,000 | 2,418 |
| $50,000 to $99,999 | 6,576 |
| $100,000 to $149,999 | 6,238 |
| $150,000 to $199,999 | 8,974 |
| $200,000 to $299,999 | 19,907 |
| $300,000 to $499,999 | 23,649 |
| $500,000 to $999,999 | 15,456 |
| $1,000,000 or more | 3,186 |
| Median (dollars) | 295,400 |
| Owner-occupied units | 86,404 |
| Housing units with a mortgage | 55,277 |
| Housing units without a mortgage | 31,127 |
| Occupied units paying rent | 49,376 |
| Less than $500 | 5,016 |
| $500 to $999 | 7,497 |
| $1,000 to $1,499 | 18,001 |
| $1,500 to $1,999 | 10,664 |
| $2,000 to $2,499 | 4,500 |
| $2,500 to $2,999 | 1,897 |
| $3,000 or more | 1,801 |
| Median (dollars) | 1,361 |
| No rent paid | 1,334 |
Demographic data for Mercer County, NJ and each city in the county. Lists of cities by population, wealth and poverty in Mercer County, NJ.
Links