51103 ZIP Code, Sioux City, IA
51103 is a ZIP code in Sioux City, Iowa in Woodbury County. It covers 12 square miles of land. The closest ZIP codes are 51104, 57049 and 51101. 16,895 people live here in 6,402 households, more than in 9 of every 10 Iowa ZIP codes. At about 1,400 people per square mile it has suburban density, and owners and renters are mixed (66% own). Median household income is $58,197, below the Iowa median of $75,059.
Quick facts
- Mailing city: Sioux City, IA
- County: Woodbury County
- Land area: 12 sq mi
- Population: 16,895
- Median household income: $58,197
Key figures
| Measure | Value |
|---|---|
| Residents | 16,895 |
| Households | 6,402 |
| Median household income | $58,197 |
| Income per person | $27,717 |
| Median age | 35.5 |
| Homeowners | 65.6% |
| Median home value | $142,900 |
| Median rent | $906 |
| Bachelor's degree or higher | 18.0% |
| Average commute (minutes) | 21.1 |
| Households with kids under 18 | 31.5% |
| Moved in the past year | 8.4% |
| Below the poverty line | 21.0% |
| Broadband internet | 85.7% |
| Speak a non-English language at home | 32.0% |
Household income
| % of households | Value |
|---|---|
| <$10K | 4.1% |
| $10–15K | 10.5% |
| $15–25K | 8.8% |
| $25–35K | 8.4% |
| $35–50K | 9.3% |
| $50–75K | 20.4% |
| $75–100K | 13.2% |
| $100–150K | 20.8% |
| $150–200K | 2.3% |
| $200K+ | 2.3% |
Age
| % of all residents | Value |
|---|---|
| <10 | 12.0% |
| 10–19 | 17.9% |
| 20–24 | 7.7% |
| 25–34 | 11.7% |
| 35–44 | 11.5% |
| 45–54 | 11.1% |
| 55–64 | 12.0% |
| 65–74 | 10.7% |
| 75+ | 5.4% |
Tenure
| % of housing units | Value |
|---|---|
| Owned, with mortgage | 36.6% |
| Owned outright | 25.1% |
| Rented | 31.9% |
| Vacant | 6.5% |
Type of building
| % of housing units | Value |
|---|---|
| Detached house | 74.8% |
| Townhome | 2.7% |
| 2–4 units | 6.5% |
| 5–19 units | 7.5% |
| 20+ units | 6.8% |
| Mobile / other | 1.7% |
Businesses in 51103
265 business establishments with 3,791 employees (ZIP Codes Business Patterns 2023).
- Other Services (except Public Administration): 45
- Construction: 44
- Retail Trade: 37
- Accommodation and Food Services: 29
- Health Care and Social Assistance: 20
- Administrative and Support and Waste Management and Remediation Services: 19
- Finance and Insurance: 14
- Wholesale Trade: 13
EDDM carrier routes
See every USPS carrier route in 51103 with residential and business mailbox counts on the route map. Open the EDDM route map.
Nearby ZIP codes
- 51104 — Sioux City city, IA (2.6 mi)
- 57049 — North Sioux City city, SD (3.1 mi)
- 51101 — Sioux City city, IA (3.3 mi)
- 68776 — South Sioux City city, NE (4.2 mi)
- 51105 — Sioux City city, IA (4.3 mi)
- 51108 — Sioux City city, IA (5.9 mi)
- 51109 — Sioux City city, IA (6.3 mi)
- 51111 — Sioux City city, IA (7.6 mi)
Areas that include 51103
- Sioux City, IA ZIP codes — 8 ZIP codes
- Woodbury County ZIP codes — 26 ZIP codes
- Iowa ZIP code data
Where it ranks
- No. 3 of 16: lowest median age in Woodbury County
- No. 5 of 7: highest median household income in Sioux City, IA
- No. 4 of 6: highest median home value in Sioux City, IA
- No. 4 of 7: highest share of owner-occupied homes in Sioux City, IA
- No. 4 of 7: highest share of households with children in Sioux City, IA
- No. 5 of 7: highest share of residents who moved in during the past year in Sioux City, IA
- No. 2 of 7: lowest median age in Sioux City, IA
- No. 5 of 6: fastest population growth in Sioux City, IA
Mail every home in 51103
Route counts on this page price as Full Service 6.5 × 9 postcards: we print, bundle by carrier route and hand the mailing to USPS. Prefer to take it to the Post Office yourself? Print only costs less and you pay postage at drop-off.
EDDM guides
ZIP code statistics describe the Census ZIP Code Tabulation Area (ZCTA) 51103, which approximates the USPS ZIP code area. Census figures: American Community Survey 5-year estimates, 2020–2024.
Frequently asked questions
- What city is 51103 in?
- 51103 is a Sioux City, IA mailing address. By land area, 100% lies inside Sioux City.
- What county is 51103 in?
- 51103 is in Woodbury County.
- What is the population of 51103?
- About 16,895 people (±987), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 16,827.
- What is the median household income in 51103?
- $58,197 (±$5,883), compared with $75,059 for Iowa as a whole. Half the households in the ZIP code earn more and half earn less.
- How many carrier routes and mailboxes are in 51103?
- EDDM2GO's stored route library does not include 51103 yet. The EDDM route map loads its carrier routes and mailbox counts when you search the ZIP code.
- What ZIP codes are near 51103?
- The closest, measured center to center: 51104 (2.6 mi, Sioux City), 57049 (3.1 mi, North Sioux City), 51101 (3.3 mi, Sioux City), 68776 (4.2 mi, South Sioux City), 51105 (4.3 mi, Sioux City) and 51108 (5.9 mi, Sioux City).
This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.