Jury Pool Profile
Williamson County, Illinois
- County seat
- Marion
- Judicial district
- 1st Judicial Circuit Court
- Population (July 2025 estimate)
- 67,225
- Census PEP. The five-year ACS survey average is 66,876.
At a glance
Williamson County is a 67,225-person venue. The county population is 89% White (Census race-alone categories). Median household income is $67,879, $15,448 below the IL state median of $83,327; 26.2% 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. The largest employment sector is Education & health services, at 32.2% of covered employment, average pay $63,963/year. Trailing-12-month unemployment is 4.39%, below the 4.85% state average. The county carried the Republican presidential candidate in 2016, 2020, and 2024, taking 68% to 69% of the vote across the three.
- Population
- 66,876
- Median household income
- $65,604
- Unemployment
- 4.4%
Who sits on a jury?
≥70% White (race-alone) and <20% Black. This county: 89% / 4%.
Williamson County has a population of 66,876, with a median age of 41.6. By Census race-alone categories, White residents make up 89.0%; Black residents 4.5%. Independently, 2.9% of residents identify as Hispanic or Latino of any race.
The median household earns $67,879; 26.2% of residents 25 and over hold a bachelor's degree or higher; 12.3% live below the federal poverty line.
Economic context
Largest sector in BLS QCEW, even counting every withheld job toward the other sectors: Education & health services, about 32% of covered jobs.
Education & health services is the largest employment sector at 32.2% of covered employment, followed by Trade, transportation & utilities at 17.8%. Trailing-12-month unemployment is 4.39%, below the Illinois state average.
Political composition
Republican candidate carried this county in 2016, 2020, and 2024 (avg winning share: 68%). 'Strongly' threshold: ≥60% avg.
Williamson County was carried by the Republican candidate in the 2016, 2020, and 2024 cycles, with 68.7% in 2024, 67.6% in 2020, 68.4% in 2016.
Languages, households, faith & health
Family households are 63% 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, Chinese, Russian, Polish, or other Slavic. Veterans account for 8.7% of the adult civilian population (4,588 individuals).