Jury Pool Profile
Jefferson County, Missouri
- County seat
- Hillsboro
- Judicial district
- 23rd Judicial Circuit Court
- Population (July 2025 estimate)
- 233,132
- Census PEP. The five-year ACS survey average is 229,458.
At a glance
Jefferson County is a 233,132-person venue. The county population is 89% White (Census race-alone categories). Median household income is $86,073, $14,490 above the MO state median of $71,583; 24.7% of residents 25 and over hold a bachelor's degree or higher. 3.3% of residents 5 and older speak a language other than English at home, most commonly Spanish and Russian, Polish, or other Slavic. The largest employment sector is Education & health services, at 26.5% of covered employment, average pay $53,520/year. Trailing-12-month unemployment is 3.51%, below the 3.85% state average. The county carried the Republican presidential candidate in 2016, 2020, and 2024, taking 65% to 68% of the vote across the three.
- Population
- 229,458
- Median household income
- $82,851
- Unemployment
- 3.5%
Who sits on a jury?
≥70% White (race-alone) and <20% Black. This county: 89% / 1%.
Jefferson County has a population of 229,458, with a median age of 40.3. By Census race-alone categories, White residents make up 89.3%; Black residents 1.0%. Independently, 2.6% of residents identify as Hispanic or Latino of any race.
The median household earns $86,073; 24.7% of residents 25 and over hold a bachelor's degree or higher; 9.3% live below the federal poverty line.
Economic context
Largest sector in BLS QCEW: Education & health services, about 26% of covered jobs.
Education & health services is the largest employment sector at 26.5% of covered employment, followed by Trade, transportation & utilities at 21.5%. Trailing-12-month unemployment is 3.51%, below the Missouri state average.
Political composition
Republican candidate carried this county in 2016, 2020, and 2024 (avg winning share: 66%). 'Strongly' threshold: ≥60% avg.
Jefferson County was carried by the Republican candidate in the 2016, 2020, and 2024 cycles, with 67.7% in 2024, 66.0% in 2020, 65.1% in 2016.
Languages, households, faith & health
Family households are 71% of all households (thresholds: ≥70% = 'family-dominant'; 50–70% = 'family-majority'; <50% = 'singles/nonfamily-majority'). 3.3% of residents 5 and older speak a language other than English at home (threshold for 'linguistically diverse' is ≥10%).
3.3% of residents 5 years and older speak a language other than English at home. The most common are Spanish, Russian, Polish, or other Slavic, German or other West Germanic. Veterans account for 7.3% of the adult civilian population (12,928 individuals).