Jefferson County's estimated 2026 population is 233,354 with a growth rate of 0.32% in the past year according to the most recent United States census data. Jefferson County is the 7th largest county in Missouri. The 2010 population was 219,130 and has seen a growth of 6.49% since that time.
Data after 2023 is projected based on recent change
The racial composition of Jefferson County includes 90.01% White, and smaller percentages for Black or African American, Asian, other race, Native American, Native Hawaiian or Pacific Islander and multiracial populations.
White (90.01%)
Two or more races (6.91%)
Black or African American (1.07%)
Asian (1.03%)
Other race (0.84%)
Native American (0.12%)
Native Hawaiian or Pacific Islander (0.03%)
Race | Population | Percentage (of total) |
|---|---|---|
| White | 205,419 | 90.01% |
| Two or more races | 15,762 | 6.91% |
| Black or African American | 2,432 | 1.07% |
| Asian | 2,350 | 1.03% |
| Other race | 1,920 | 0.84% |
| Native American | 284 | 0.12% |
| Native Hawaiian or Pacific Islander | 60 | 0.03% |
Married
Widowed
Divorced
Separated
Never Married
Jefferson County's average per capita income is $50,761. Household income levels show a median of $80,522. The poverty rate stands at 8.55%.
Name | Median | Mean |
|---|---|---|
| Married Families | $108,201 | $120,639 |
| Families | $94,684 | $108,983 |
| Households | $80,522 | $96,337 |
| Non Families | $44,038 | $59,635 |
Average Income
Median Household Income
Poverty Rate
