Jefferson County, MO
Demographics & Statistics
Updated: 2025-10-25
Updated: 2025-10-25
Life in Jefferson County research summary. HomeSnacks has been researching the quality of life in Jefferson County over the past eight years using Census data, FBI crime data, cost of living data, and other primary sources. Based on the most recently available data, we found the following about life in Jefferson County:
The population in Jefferson County is 228,227.
The median home value in Jefferson County is $285,722.
The median income in Jefferson County is $80,522.
The median rent in Jefferson County is $972.
The unemployment rate in Jefferson County is 3.6%.
The poverty rate in Jefferson County is 8.6%.
The average high in Jefferson County is 73.5° and there are 100.1 inches of rainfall annually.
The average high in Jefferson County is 73.5°.
There are 80.58 nice days each year.
Expect an average of 100.1 inches of rain each year with 5.1 inches of snow.
There is an average of 5:13 hours of sun each day in Jefferson County.
| Stat | Jefferson County |
|---|---|
| Mean High | 73.5 |
| Nice Days | 80.58 |
| Rainfall | 100.1 |
| Snowfall | 5.1 |
| Sunny Hours | 5:13 |
The current population in Jefferson County is 228,227. The population has increased 0.9% from 2019.
| Year | Population | % Change |
|---|---|---|
| 2023 | 225,913 | 0.5% |
| 2022 | 224,777 | 0.4% |
| 2021 | 223,951 | - |
Jefferson County is 50.0% female with 114,161 female residents.
Jefferson County is 50.0% male with 114,066 male residents.
| Gender | Jefferson County | MO | USA |
|---|---|---|---|
| Female | 50.0% | 50.7% | 50.5% |
| Male | 50.0% | 49.3% | 49.5% |
Jefferson County is:
89.0% White with 203,032 White residents.
1.1% African American with 2,431 African American residents.
0.1% American Indian with 191 American Indian residents.
1.0% Asian with 2,297 Asian residents.
0.0% Hawaiian with 60 Hawaiian residents.
0.3% Other with 674 Other residents.
6.0% Two Or More with 13,749 Two Or More residents.
2.5% Hispanic with 5,793 Hispanic residents.
| Race | Jefferson County | MO | USA |
|---|---|---|---|
| White | 89.0% | 76.8% | 58.2% |
| African American | 1.1% | 11.0% | 12.0% |
| American Indian | 0.1% | 0.2% | 0.5% |
| Asian | 1.0% | 2.1% | 5.7% |
| Hawaiian | 0.0% | 0.1% | 0.2% |
| Other | 0.3% | 0.4% | 0.5% |
| Two Or More | 6.0% | 4.4% | 3.9% |
| Hispanic | 2.5% | 5.1% | 19.0% |
3.2% of households in Jefferson County earn Less than $10,000.
2.4% of households in Jefferson County earn $10,000 to $14,999.
5.6% of households in Jefferson County earn $15,000 to $24,999.
6.5% of households in Jefferson County earn $25,000 to $34,999.
11.7% of households in Jefferson County earn $35,000 to $49,999.
17.2% of households in Jefferson County earn $50,000 to $74,999.
15.4% of households in Jefferson County earn $75,000 to $99,999.
21.1% of households in Jefferson County earn $100,000 to $149,999.
9.3% of households in Jefferson County earn $150,000 to $199,999.
7.7% of households in Jefferson County earn $200,000 or more.
| Income | Jefferson County | MO | USA |
|---|---|---|---|
| Less than $10,000 | 3.2% | 4.8% | 4.9% |
| $10,000 to $14,999 | 2.4% | 4.0% | 3.6% |
| $15,000 to $24,999 | 5.6% | 7.6% | 6.6% |
| $25,000 to $34,999 | 6.5% | 7.9% | 6.8% |
| $35,000 to $49,999 | 11.7% | 12.2% | 10.4% |
| $50,000 to $74,999 | 17.2% | 17.5% | 15.7% |
| $75,000 to $99,999 | 15.4% | 13.3% | 12.7% |
| $100,000 to $149,999 | 21.1% | 16.9% | 17.4% |
| $150,000 to $199,999 | 9.3% | 7.7% | 9.3% |
| $200,000 or more | 7.7% | 8.1% | 12.6% |
1.0% of adults in Jefferson County completed < 9th grade.
7.0% of adults in Jefferson County completed 9-12th grade.
32.0% of adults in Jefferson County completed high school / ged.
23.0% of adults in Jefferson County completed some college.
13.0% of adults in Jefferson County completed associate's degree.
16.0% of adults in Jefferson County completed bachelor's degree.
6.0% of adults in Jefferson County completed master's degree.
1.0% of adults in Jefferson County completed professional degree.
1.0% of adults in Jefferson County completed doctorate degree.
| Education | Jefferson County | MO | USA |
|---|---|---|---|
| < 9th Grade | 0% | 3% | 5% |
| 9-12th Grade | 7% | 6% | 6% |
| High School / GED | 32% | 30% | 26% |
| Some College | 23% | 21% | 19% |
| Associate's Degree | 13% | 8% | 9% |
| Bachelor's Degree | 16% | 20% | 21% |
| Master's Degree | 6% | 9% | 10% |
| Professional Degree | 1% | 2% | 2% |
| Doctorate Degree | 1% | 1% | 2% |
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