Jury Pool Profile
Marion County, Iowa
- County seat
- Knoxville
- Judicial district
- 5th Judicial District Court
- Population (July 2025 estimate)
- 34,192
- Census PEP. The five-year ACS survey average is 33,642.
At a glance
Marion County is a 34,192-person venue. The county population is 94% White (Census race-alone categories). Median household income is $81,672, $6,049 above the IA state median of $75,623; 32.1% 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 Manufacturing, at 43.1% of covered employment, average pay $88,561/year. Trailing-12-month unemployment is 2.64%, below the 3.34% state average. The county carried the Republican presidential candidate in 2016, 2020, and 2024, taking 62% to 68% of the vote across the three.
- Population
- 33,642
- Median household income
- $78,680
- Unemployment
- 2.6%
Who sits on a jury?
≥70% White (race-alone) and <20% Black. This county: 94% / 0%.
Marion County has a population of 33,642, with a median age of 39.9. By Census race-alone categories, White residents make up 94.4%; Black residents 0.4%. Independently, 2.3% of residents identify as Hispanic or Latino of any race.
The median household earns $81,672; 32.1% of residents 25 and over hold a bachelor's degree or higher; 9.8% live below the federal poverty line.
Economic context
Largest sector in BLS QCEW, even counting every withheld job toward the other sectors: Manufacturing, about 43% of covered jobs.
Manufacturing is the largest employment sector at 43.1% of covered employment, followed by Education & health services at 21.2%. Trailing-12-month unemployment is 2.64%, below the Iowa state average.
Political composition
Republican candidate carried this county in 2016, 2020, and 2024 (avg winning share: 65%). 'Strongly' threshold: ≥60% avg.
Marion County was carried by the Republican candidate in the 2016, 2020, and 2024 cycles, with 68.2% in 2024, 65.8% in 2020, 62.3% in 2016.
Languages, households, faith & health
Family households are 68% 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, German or other West Germanic, Tagalog. Veterans account for 5.7% of the adult civilian population (1,466 individuals).