Mercer County, New Jersey Facts
| Facts | |
| State | New Jersey |
| Land area | 224.6 square miles |
| Population Density | 1,632.2 persons per square mile. |
| Population | |
| Population (2013) | 370,414 |
| Population change | 0.8% | Under 5 years of age | 5.8% |
| Under 18 | 22% |
| 65 and over | 13.5% |
| Females | 51% |
| White | 66 |
| Hispanic or Latino of any race | 16.2 |
| Asian | 10% |
| Two or more races | 2.1% |
| Black or African American | 21.1% |
| Native American | 0.6% |
| Pacific Islander | 0.2% |
| Had graduated from high school | 87% |
| Had a bachelor’s degree or higher | 38.8% |
| Veterans | 17,493 |
| Households and Housing | |
| Households | 130,754 |
| Persons per household | 2.7 |
| Living in the same house for one year or more | 87.6% |
| Median household income | $73,480 |
| The per capita income | $37,465 |
| Live below the poverty line. | 11.2% |
| housing units | 144,222 |
| Multi-unit structures | 30% |
| The median value of owner-occupied housing | $286,900 |
| Residents owning their homes. | 65.8% |
| Business Facts | |
| Total number of firms | 30,067 |
| Women-owned firms | 29.9% |
| Asian-owned firms | 10% |
| Hispanic-owned firms | 4.8% |
| Black-owned firms | 7.6% |
| Native American-owned firms | 0% |
| Pacific Islander-owned firms | 0% |
| Retail sales | $5,089,133 |
| Retail sales per capita | $14,004 |
| Manufacturers shipments | $0 |
| Merchant wholesaler sales | $8,420,998 |