ZIP 51109 · Sioux City
Who lives in ZIP code 51109 (Sioux City, IA): age, income, housing, education and work.
Source: uszips 2026 (ACS-based ZIP file)
2026 ZIP profile
Sioux City, IA · Plymouth County
uszips 2026
People3,606
Median age39.4
Household income$79,034
Home value$134,453
Median rent$627/mo
Poverty16.1%
College degree+3.3%
Commute16 min
Place
- Metro area
- Le Mars, IA (micro)
- Wider region
- Sioux City-Le Mars, IA-NE-SD
- Time zone
- Central
- Density
- 79 / sq mi
- Housing units
- 1,447
Spans 2 counties
Share of the ZIP's people in each county.
Age mix
17.8% are 65 or older; 75.8% are adults.
Household income
29.6% of households earn $100K+. Median per person: $44,003.
Education (adults 25+)
29.9% of degrees are in STEM fields.
Race
23.3% Hispanic or Latino (of any race).
Households & family
- Married
- 43.8%
- Never married
- 39.4%
- Divorced
- 10.7%
- Widowed
- 6.1%
- Family size
- 3.27
- Dual-income families
- 52.7%
Housing
- Own their home
- 87.0%
- Rent burden
- 11.4%
- Men / women
- 51% / 49%
Work
- In labor force
- 66.1%
- Unemployment
- 1.9%
- Self-employed
- 8.2%
- Farmers
- 0.0%
Community
- Charitable givers
- 13.6%
- Veterans
- 7.1%
- With a disability
- 12.6%
- No health insurance
- 9.6%
- Limited English
- 3.5%
Source: uszips 2026 (ACS-based ZIP file). Shares are percentages of people, households or adults as the measure implies.