People QuickFacts Mercer County New Jersey Population, 2012 estimate 368,303 8,864,590 Population, 2010 (April 1) estimates base 366,511 8,791,898 Population, percent change, April 1, 2010 to July 1, 2012 0.5% 0.8% Population, 2010 366,513 8,791,894 Persons under 5 years, percent, 2011 5.9% 6.1% Persons under 18 years, percent, 2011 22.4% 23.2% Persons 65 years and over, percent, 2011 12.9% 13.7% Female persons, percent, 2011 51.1% 51.3%  White persons, percent, 2011 (a) 66.9% 74.1% Black persons, percent, 2011 (a) 21.0% 14.6% American Indian and Alaska Native persons, percent, 2011 (a) 0.6% 0.6% Asian persons, percent, 2011 (a) 9.3% 8.7% Native Hawaiian and Other Pacific Islander persons, percent, 2011 (a) 0.2% 0.1% Persons reporting two or more races, percent, 2011 2.0% 1.9% Persons of Hispanic or Latino Origin, percent, 2011 (b) 15.5% 18.1% White persons not Hispanic, percent, 2011 54.1% 58.9%  Living in same house 1 year & over, percent, 2007-2011 86.8% 89.7% Foreign born persons, percent, 2007-2011 20.0% 20.6% Language other than English spoken at home, percent age 5+, 2007-2011 27.0% 29.2% High school graduate or higher, percent of persons age 25+, 2007-2011 87.1% 87.6% Bachelor's degree or higher, percent of persons age 25+, 2007-2011 38.0% 35.0% Veterans, 2007-2011 19,164 472,716 Mean travel time to work (minutes), workers age 16+, 2007-2011 27.0 30.1  Housing units, 2011 143,390 3,562,553 Homeownership rate, 2007-2011 67.5% 66.6% Housing units in multi-unit structures, percent, 2007-2011 30.4% 35.9% Median value of owner-occupied housing units, 2007-2011 $302,100 $349,100 Households, 2007-2011 129,933 3,180,854 Persons per household, 2007-2011 2.66 2.69 Per capita money income in the past 12 months (2011 dollars), 2007-2011 $36,721 $35,678 Median household income, 2007-2011 $73,883 $71,180 Persons below poverty level, percent, 2007-2011 10.7% 9.4%     Business QuickFacts Mercer County New Jersey Private nonfarm establishments, 2010 9,756 228,937 Private nonfarm employment, 2010 175,798 3,367,169 Private nonfarm employment, percent change, 2000-2010 1.0 -5.1 Nonemployer establishments, 2010 22,169 604,723  Total number of firms, 2007 30,067 781,622 Black-owned firms, percent, 2007 7.6% 7.7% American Indian- and Alaska Native-owned firms, percent, 2007 S 0.4% Asian-owned firms, percent, 2007 10.0% 8.7% Native Hawaiian and Other Pacific Islander-owned firms, percent, 2007 S 0.1% Hispanic-owned firms, percent, 2007 4.8% 8.7% Women-owned firms, percent, 2007 29.9% 27.3%  Manufacturers shipments, 2007 ($1000) D 116,608,094 Merchant wholesaler sales, 2007 ($1000) 8,420,998 233,413,004 Retail sales, 2007 ($1000) 5,089,133 124,813,580 Retail sales per capita, 2007 $14,004 $14,453 Accommodation and food services sales, 2007 ($1000) 695,848 19,993,613 Building permits, 2011 400 12,952     Geography QuickFacts Mercer County New Jersey Land area in square miles, 2010 224.56 7,354.22 Persons per square mile, 2010 1,632.2 1,195.5 FIPS Code 021 34 Metropolitan or Micropolitan Statistical Area Trenton-Ewing, NJ Metro Area   (a) Includes persons reporting only one race. (b) Hispanics may be of any race, so also are included in applicable race categories. FN: Footnote on this item for this area in place of data NA: Not available D: Suppressed to avoid disclosure of confidential information X: Not applicable S: Suppressed; does not meet publication standards Z: Value greater than zero but less than half unit of measure shown F: Fewer than 100 firms Source: US Census Bureau State & County QuickFacts