Sioux City, IA · standard
ZIP Code 51104
Woodbury County, Iowa - Census ACS demographics, housing tenure, and business patterns, benchmarked against every US ZIP.
- 22,104
- 1,099/sq mi High-density area
- $75,362
- Median income Near-median income area
- $211,100
- Median home value Near-median home value
- 28.9%
- Bachelor's or higher Near-average bachelor's attainment
National ZIP placement
Sioux City pairs an above-median household income with below-median home values, in a low-density, homeowner-dominated area.
- Top 45%
- household income, US ZIPs
- 47th pct
- home value, US ZIPs
- 1,099
- people per sq mi
- 65%
- owner-occupied homes
Source: U.S. Census Bureau ACS 5-Year Estimates (2019–2023). Percentiles rank ZIP 51104 against every reporting US ZIP.
FHFA HPI release change
What changed in the latest House Price Index year
- FHFA House Price Index values in ZIP 51104 (Sioux City, IA) rose +5.0% from 2023 to 2024. The all-transactions index moved from 206.8 in 2023 to 217.1 in 2024 (2000 = 100).
ZIP code 51104 is a densely settled ZIP (a standard USPS delivery area) in Sioux City, Woodbury County, Iowa, with 22,104 residents across 20.1 square miles, a density of 1,099 people per square mile, in the Chicago time zone.
ZIP 51104 lands in the middle-income range, with a median household income of $75,362 (2% below the average Iowa ZIP), while per-capita income is $36,752. The poverty rate is 10.4%, with unemployment at 4.6%; those measures add context to the income figure. Housing is both higher-cost and owner-heavy: median home value is $211,100 (20% above the average Iowa ZIP), while 64.5% of occupied homes are owner-occupied and median rent is $998.
Educational attainment sits below the national norm: 28.9% of adults hold a bachelor's degree or higher, the median age is 37.5, and the average commute is 19 minutes. The page also surfaces 10 ZIP codes within roughly 10 miles and 6 more in Woodbury County, so 51104 can be compared with both its immediate and county-level context.
Every figure on this page is sourced from the U.S. Census Bureau American Community Survey 5-Year Estimates (including median rent) and the FHFA House Price Index, no estimates, no proprietary scoring. Verify with Census →
Top industries in ZIP 51104
Top 5 sectors by establishment count in Sioux City, IA
Which industries have the most business establishments in ZIP 51104.
- Health care and social assistance
Health care and social assistance
83 establishments
- Other services (except public administration) 32
Other services (except public administration)
32 establishments
- Accommodation and food services 27
Accommodation and food services
27 establishments
- Construction 24
Construction
24 establishments
- Retail trade 24
Retail trade
24 establishments
What this shows Establishment counts come from the Census ZIP Code Business Patterns program, which counts physical business locations rather than employees or revenue.
Source: U.S. Census Bureau, American Community Survey 5-Year Estimates + ZIP Code Business Patterns + FHFA HPI ACS demographics and median rent, ZBP business establishments, FHFA HPI for ZIP 51104, Sioux City, IA · 2023 Census ACS 5-Year Estimates use a rolling 60-month sample for stable small-geography estimates; ZBP updated annually; FHFA HPI updated quarterly/annually.
Quick Facts
22,104
Population
20.1
Area (sq mi)
1,099
People / sq mi
Chicago
Time Zone
standard
ZIP Type
Who lives in ZIP 51104?
37.5
Median Age
48.8%
Male
51.2%
Female
11.5%
Foreign-Born
Hispanic or Latino is an ethnicity category from the Census Bureau and may overlap with other categories above.
Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)
How much do residents earn?
$75,362
Median Household Income
-2% vs state ZIP avg
$36,752
Per Capita Income
10.4%
Poverty Rate
4.6%
Unemployment Rate
18.5 min
Mean Commute Time
How ZIP 51104 ranks among Iowa ZIPs
Sioux City, IA household income vs. every Iowa ZIP code
Median household income among 911 reporting Iowa ZIPs (this ZIP's population is too small for a reliable national-corpus placement)
$75,362 Top 47% higher than 53% of 911 Iowa ZIPs
Each bar is a $20K-wide band; taller bars hold more Iowa ZIPs. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.
Source U.S. Census Bureau, ACS 5-Year Estimates · 2019–2023
Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)
What is the education profile here?
Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)
What does housing look like?
Housing stock: occupied vs vacant
9,118housing units
9,118
Total Housing Units
8,729
Occupied Units
389
Vacant Units
2.58
Avg Household Size
Occupancy Type
$211,100
Median Home Value
+20% vs state ZIP avg
$998
Median Rent
1959
Median Year Built
Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)
How have home values changed over time?
FHFA House Price Index, annual appreciation data based on repeat sales and appraisals
+5.0%
YoY Change (2024)
217
HPI Index (2000 = 100)
+117%
Total Change Since 2000
Home values in ZIP 51104 have increased 5.0% over the past year (2024). Since 2000, this ZIP has seen +117% cumulative appreciation.
| Year | Annual Change | HPI Index |
|---|---|---|
| 2020 | +2.9% | 154 |
| 2021 | +9.3% | 169 |
| 2022 | +15.3% | 194 |
| 2023 | +6.4% | 207 |
| 2024 | +5.0% | 217 |
Source: Federal Housing Finance Agency (FHFA) House Price Index, All-Transactions, Five-Digit ZIP Codes (Developmental Index). Index base = 100 in year 2000. Data through 2024. ZIP codes with few transactions may show missing values.
What businesses operate in this ZIP?
Census Bureau data shows 295 business establishments in ZIP 51104, employing approximately 4,147 people with a combined annual payroll of $200,225,000.
295
Businesses
4,147
Employees
$200.2M
Annual Payroll
13
Industry Sectors
| Industry | Establishments | % of Total |
|---|---|---|
| Health care and social assistance | 83 | 28.1% |
| Other services (except public administration) | 32 | 10.8% |
| Accommodation and food services | 27 | 9.2% |
| Construction | 24 | 8.1% |
| Retail trade | 24 | 8.1% |
| Finance and insurance | 19 | 6.4% |
| Administrative and support and waste management and remediation services | 19 | 6.4% |
| Real estate and rental and leasing | 18 | 6.1% |
| Professional, scientific, and technical services | 17 | 5.8% |
| Transportation and warehousing | 9 | 3.0% |
| Arts, entertainment, and recreation | 7 | 2.4% |
| Information | 6 | 2.0% |
| Wholesale trade | 4 | 1.4% |
Source: U.S. Census Bureau, ZIP Code Business Patterns (ZBP), 2023. Employment figures may include noise for disclosure avoidance.
Nearby ZIP Codes
Want a side-by-side? Compare 51104 vs 51101 →
ZIP 51104 vs its nearest neighbors, by population
Resident population of this ZIP and the closest reporting ZIP codes within ~10 miles.
- 51106
Sioux City (51106)
26,544 residents
- 51104
Sioux City (51104)
22,104 residents
- 51103
Sioux City (51103)
17,453 residents
- 68776
South Sioux City (68776)
15,447 residents
- 51105 10,216
Sioux City (51105)
10,216 residents
- 57049 5,789
North Sioux City (57049)
5,789 residents
- 51108 5,566
Sioux City (51108)
5,566 residents
- 51109 3,098
Sioux City (51109)
3,098 residents
- 68731 2,637
Dakota City (68731)
2,637 residents
What this shows Among its immediate neighbors, ZIP 51104 ranks #2 by population - useful context the national average alone can't give.
ZIP 51104 vs its nearest neighbors, by median income
Median household income of this ZIP and the closest reporting ZIP codes within ~10 miles.
- 57049
North Sioux City (57049)
$93,134 median income
- 51108
Sioux City (51108)
$81,205 median income
- 68731
Dakota City (68731)
$79,924 median income
- 51109
Sioux City (51109)
$79,034 median income
- 51106
Sioux City (51106)
$78,434 median income
- 51104
Sioux City (51104)
$75,362 median income
- 68776
South Sioux City (68776)
$68,750 median income
- 51103
Sioux City (51103)
$58,197 median income
- 51105
Sioux City (51105)
$51,786 median income
What this shows By household income, ZIP 51104 ranks #6 of 9 neighboring ZIPs, local affluence varies block to block, not just metro to metro.
| ZIP Code | City | Population | Distance |
|---|---|---|---|
| 51101 | Sioux City, IA | 809 | 2.9 mi |
| 51103 | Sioux City, IA | 17,453 | 2.3 mi |
| 51105 | Sioux City, IA | 10,216 | 2.7 mi |
| 51108 | Sioux City, IA | 5,566 | 3.4 mi |
| 68776 | South Sioux City, NE | 15,447 | 5.5 mi |
| 57049 | North Sioux City, SD | 5,789 | 5.3 mi |
| 51109 | Sioux City, IA | 3,098 | 5.6 mi |
| 51111 | Sioux City, IA | 94 | 8.7 mi |
| 51106 | Sioux City, IA | 26,544 | 6.4 mi |
| 68731 | Dakota City, NE | 2,637 | 9.5 mi |
Nationwide ZIPs with similar ACS profiles
Two Census-derived peer sets for ZIP 51104, both outside IA so the neighborhoods are not geographic containment (Nearby and same-county blocks stay local).
Similar population
Nearest cross-state ZIPs by resident population (22,104 here; floor ≥1,000).
Similar median household income
Nearest cross-state ZIPs by ACS median household income.
More ZIP Codes in Woodbury County
Related Areas
Frequently Asked Questions
What county is ZIP code 51104 in?
ZIP code 51104 (Sioux City) is located in Woodbury County, Iowa. Woodbury County contains multiple ZIP codes, see the full list at /counties/woodbury-ia.
What is the population of ZIP code 51104?
ZIP code 51104 in Sioux City, IA has a population of 22,104 according to the Census Bureau ACS 2023 estimates.
What is the median household income in ZIP 51104?
The median household income in ZIP 51104 is $75,362, which is 1% below the national average of $76,288.
What is the average home value in ZIP 51104?
The median home value in ZIP 51104 is $211,100, which is 24% below the national average of $278,155.
What is the demographic makeup of ZIP 51104?
The largest racial group in ZIP 51104 is White at 66.1%. Hispanic or Latino residents make up 20.3% of the population.
How many businesses are in ZIP code 51104?
ZIP code 51104 has 295 business establishments employing approximately 4,147 people, according to Census Bureau ZIP Code Business Patterns (ZBP) 2023 data.
What are the main industries in ZIP code 51104?
The top industries by establishment count in ZIP 51104 are: Health care and social assistance (83), Other services (except public administration) (32), Accommodation and food services (27). There are 13 industry sectors represented in total.
How have home values changed in ZIP code 51104?
According to the FHFA House Price Index, home values in ZIP 51104 increased by 5.0% in 2024. Since 2000, home values in this ZIP have appreciated by approximately 117%. This is a developmental index based on repeat sales and appraisal data from Fannie Mae and Freddie Mac.
What is the education level in ZIP code 51104?
In ZIP code 51104, 57.7% of residents aged 25+ have a high school diploma or higher, and 28.9% hold a bachelor's degree or higher. These figures come from the Census Bureau ACS 5-Year Estimates (2023).
What is the average commute time in ZIP 51104?
The mean commute time for workers in ZIP code 51104 is 18.5 minutes according to Census ACS data. The national average is roughly 26 minutes, so commuters here spend less time traveling to work than typical.
What percentage of residents own vs. rent in ZIP 51104?
In ZIP code 51104, approximately 64.5% of occupied housing units are owner-occupied and 35.5% are renter-occupied, based on Census ACS 2023 data.
What is the poverty rate in ZIP code 51104?
The poverty rate in ZIP code 51104 is 10.4% according to Census Bureau ACS 2023 estimates. This measures the percentage of the population living below the federal poverty threshold.
Related
Take this with you
What to do with ZIP 51104's numbers, next.
- See how ZIP 51104 compares to a neighboring ZIP code on the same Census fields Compare this ZIP
- Check where Sioux City, IA ranks among every U.S. ZIP code on income, education, or homeownership View national rankings
- Save this ZIP to your shortlist to track alongside others you're considering View your shortlist
ZIP Code Tabulation Areas (ZCTAs) are Census Bureau approximations of USPS ZIP codes; figures describe the ZCTA area, not any single address within it.