Jury Pool Profile
Johnson County, Illinois
- County seat
- Vienna
- Judicial district
- 1st Judicial Circuit Court
- Population (July 2025 estimate)
- 13,363
- Census PEP. The five-year ACS survey average is 13,376.
At a glance
Johnson County is a 13,363-person venue. The county population is 81% White and 8% Black (Census race-alone categories). Median household income is $66,013, $17,314 below the IL state median of $83,327; 19.6% of residents 25 and over hold a bachelor's degree or higher. 2.3% of residents 5 and older speak a language other than English at home. The largest published sector is Education & health services, at 12.5% of covered employment, average pay $47,462/year. Trailing-12-month unemployment is 5.17%, above the 4.85% state average. The county carried the Republican presidential candidate in 2016, 2020, and 2024, taking 77% to 79% of the vote across the three. At least 14% of residents here live in group quarters rather than households, barracks, dormitories, correctional facilities or nursing homes; the ACS survey and the 2020 census disagree on how many, and this is the lower of the two, so the figures above describe a population substantially larger than the one a summons reaches.
- Population
- 13,376
- Median household income
- $62,528
- Unemployment
- 5.2%
Who sits on a jury?
≥70% White (race-alone) and <20% Black. This county: 81% / 8%.
Johnson County has a population of 13,376, with a median age of 41.4. By Census race-alone categories, White residents make up 80.5%; Black residents 7.8%. Independently, 4.5% of residents identify as Hispanic or Latino of any race.
The median household earns $66,013; 19.6% of residents 25 and over hold a bachelor's degree or higher; 14.6% live below the federal poverty line.
Economic context
BLS withholds the sectors of about 1,270 state and local government jobs here. Counted as schools and hospitals, Education & health services is the largest sector; counted as prisons and public administration, Public administration is.
Education & health services is the largest published sector at 12.5% of covered employment, followed by Professional & business services at 11.4%. Trailing-12-month unemployment is 5.17%, above the Illinois state average.
Political composition
Republican candidate carried this county in 2016, 2020, and 2024 (avg winning share: 78%). 'Strongly' threshold: ≥60% avg.
Johnson County was carried by the Republican candidate in the 2016, 2020, and 2024 cycles, with 78.6% in 2024, 78.4% in 2020, 77.2% in 2016.
Languages, households, faith & health
Family households are 62% of all households (thresholds: ≥70% = 'family-dominant'; 50–70% = 'family-majority'; <50% = 'singles/nonfamily-majority'). 2.3% of residents 5 and older speak a language other than English at home (threshold for 'linguistically diverse' is ≥10%).
2.3% of residents 5 years and older speak a language other than English at home. The most common are Spanish, German or other West Germanic, Vietnamese. Veterans account for 8.1% of the adult civilian population (886 individuals).