Mercer County's 2026 population is estimated at 3,358, reflecting a -1.38% growth rate over the past year (World Population Review estimate based on U.S. Census Bureau data). Mercer County is the 114th largest county in Missouri. The 2010 population was 3,770 and has grown -10.93% since 2010.
Data after 2023 is projected based on recent change
Overall: 42.4 years
Female: 43.7 years
Male: 39.9 years
There are 2,628 adults, (777 of whom are seniors) in Mercer County.
Female: 1,766 (50.7%)
Male: 1,716 (49.3%)
The racial composition of Mercer County includes 92.42% White, and smaller percentages for other race, Asian, Native American, Black or African American, Native Hawaiian or Pacific Islander and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| White | 3,218 | 92.42% |
| Two or more races | 119 | 3.42% |
| Other race | 81 | 2.33% |
| Asian | 31 | 0.89% |
| Native American | 23 | 0.66% |
| Black or African American | 6 | 0.17% |
| Native Hawaiian or Pacific Islander | 4 | 0.11% |
Mercer County 's average per capita income is $42,406. Household income levels show a median of $62,679. The poverty rate stands at 13.46%.
| Name | Median ↓ | Mean |
|---|---|---|
| Married Families | $81,324 | - |
| Families | $70,875 | $78,553 |
| Households | $62,679 | $70,588 |
| Non Families | $28,264 | $46,869 |
Average Income
Median Household Income
Poverty Rate
