Platte County's 2026 population is estimated at 115,397, reflecting a 0.96% growth rate over the past year (World Population Review estimate based on U.S. Census Bureau data). Platte County is the 11th largest county in Missouri. The 2010 population was 89,714 and has grown 28.63% since 2010.
Data after 2023 is projected based on recent change
Overall: 39.1 years
Female: 39.7 years
Male: 38.4 years
There are 84,888 adults, (17,756 of whom are seniors) in Platte County.
Female: 55,801 (50.6%)
Male: 54,570 (49.4%)
The racial composition of Platte County includes 78.64% White, 7.73% Black or African American, and smaller percentages for other race, Asian, Native American, Native Hawaiian or Pacific Islander and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| White | 86,796 | 78.64% |
| Black or African American | 8,533 | 7.73% |
| Two or more races | 8,501 | 7.7% |
| Other race | 3,223 | 2.92% |
| Asian | 2,807 | 2.54% |
| Native American | 295 | 0.27% |
| Native Hawaiian or Pacific Islander | 216 | 0.2% |
Platte County 's average per capita income is $59,701. Household income levels show a median of $96,227. The poverty rate stands at 7.02%.
| Name | Median ↓ | Mean |
|---|---|---|
| Married Families | $138,168 | $169,962 |
| Families | $121,335 | $151,592 |
| Households | $96,227 | $125,410 |
| Non Families | $56,612 | $68,875 |
Average Income
Median Household Income
Poverty Rate