Jury Pool Profile
Johnson County, Kansas
- County seat
- Olathe
- Judicial district
- 10th Judicial District Court
- Population (July 2025 estimate)
- 636,906
- Census PEP. The five-year ACS survey average is 620,631.
At a glance
Johnson County is a 636,906-person venue. The county population is 79% White (Census race-alone categories). Median household income is $109,357, $33,955 above the KS state median of $75,402; 57.6% of residents 25 and over hold a bachelor's degree or higher. 12.1% of residents 5 and older speak a language other than English at home, most commonly Spanish and Chinese. The largest employment sector is Trade, transportation & utilities, at 21.5% of covered employment, average pay $66,682/year. Trailing-12-month unemployment is 3.59%, below the 3.83% state average. The county has not voted for the same party across the 2016, 2020, and 2024 cycles . See Section 3 for cycle-by-cycle breakdowns.
- Population
- 620,631
- Median household income
- $109,208
- Unemployment
- 3.6%
Who sits on a jury?
≥70% White (race-alone) and <20% Black. This county: 79% / 5%.
Johnson County has a population of 620,631, with a median age of 38.6. By Census race-alone categories, White residents make up 78.5%; Black residents 4.9%. Independently, 9.3% of residents identify as Hispanic or Latino of any race.
The median household earns $109,357; 57.6% of residents 25 and over hold a bachelor's degree or higher; 6.0% live below the federal poverty line.
Economic context
BLS QCEW 'Education & health services' is ≥20% of total covered employment. This county: 20.4%.
Trade, transportation & utilities is the largest employment sector at 21.5% of covered employment, followed by Education & health services at 20.4%. Trailing-12-month unemployment is 3.59%, below the Kansas state average.
Political composition
Different parties won across the 2016, 2020, and 2024 cycles.
Johnson County was carried by the Democratic candidate with 53.4% of the vote in 2024; the Democratic candidate with 52.7% of the vote in 2020; the Republican candidate with 47.9% of the vote in 2016.
Languages, households, faith & health
Family households are 66% of all households (thresholds: ≥70% = 'family-dominant'; 50–70% = 'family-majority'; <50% = 'singles/nonfamily-majority'). 12.1% of residents 5 and older speak a language other than English at home (threshold for 'linguistically diverse' is ≥10%).
12.1% 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 5.3% of the adult civilian population (25,069 individuals).