Mercer County's estimated 2026 population is 403,822 with a growth rate of 1.47% in the past year according to the most recent United States census data. Mercer County is the 12th largest county in New Jersey. The 2010 population was 367,717 and has seen a growth of 9.82% since that time.
Data after 2023 is projected based on recent change
The racial composition of Mercer County includes 49.79% White, 19.19% Black or African American, 12.06% Asian, 9.13% other race, and smaller percentages for Native American, Native Hawaiian or Pacific Islander and multiracial populations.
White (49.79%)
Black or African American (19.19%)
Asian (12.06%)
Other race (9.13%)
Two or more races (9.1%)
Native American (0.7%)
Native Hawaiian or Pacific Islander (0.02%)
Race | Population | Percentage (of total) |
|---|---|---|
| White | 190,842 | 49.79% |
| Black or African American | 73,554 | 19.19% |
| Asian | 46,234 | 12.06% |
| Other race | 35,007 | 9.13% |
| Two or more races | 34,872 | 9.1% |
| Native American | 2,693 | 0.7% |
| Native Hawaiian or Pacific Islander | 84 | 0.02% |
Married
Widowed
Divorced
Separated
Never Married
Mercer County's average per capita income is $60,087. Household income levels show a median of $96,333. The poverty rate stands at 11.07%.
Name | Median | Mean |
|---|---|---|
| Married Families | $151,725 | $204,394 |
| Families | $124,699 | $171,047 |
| Households | $96,333 | $138,732 |
| Non Families | $51,896 | $71,512 |
Average Income
Median Household Income
Poverty Rate