PlainZIP

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
$75,362
Median income
$211,100
Median home value
28.9%
Bachelor's or higher

The verdict

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.

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 Iowa average), while per-capita income is $36,752. 10.4% of residents live below the poverty line, and the unemployment rate reads 4.6%. On housing, the median home value is $211,100 (20% above the state average) with median rent at $998 per month, and 64.5% of occupied units are owner-occupied.

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. A geography-based comparison follows: 10 ZIP codes within about 10 miles of 51104, plus 6 more within Woodbury County, give a clearer read than the national average alone.

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.

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 · ZIP Code Business Patterns (ZBP) As of 2023

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

Neighborhood Scorecard
Get an A-F grade across income, safety, housing, rent, education, commute, and childcare for this ZIP code.
View Scorecard →

Who lives in ZIP 51104?

37.5

Median Age

48.8%

Male

51.2%

Female

11.5%

Foreign-Born

White 66.1%
African American 5.5%
Asian 3.1%
American Indian or Alaska Native 1.9%
Native Hawaiian or Pacific Islander 2.5%
Two or More Ethnicities 16.4%
Hispanic or Latino 20.3%

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

$36,752

Per Capita Income

10.4%

Poverty Rate

4.6%

Unemployment Rate

18.5 min

Mean Commute Time

How ZIP 51104 ranks nationally

Sioux City, IA household income vs. every US ZIP code

Median household income, the full national distribution, with this ZIP marked

$75,362 Top 45% higher than 55% of 30,318 US ZIPs

$0–$20,000: 118 US ZIPs (0%). Below this entry. $20,000–$40,000: 1,573 US ZIPs (5%). Below this entry. $40,000–$60,000: 7,092 US ZIPs (23%). Below this entry. $60,000–$80,000: 9,980 US ZIPs (33%). This entry sits in this band. $80,000–$100,000: 5,778 US ZIPs (19%). Above this entry. $100,000–$120,000: 2,855 US ZIPs (9%). Above this entry. $120,000–$140,000: 1,362 US ZIPs (4%). Above this entry. $140,000–$160,000: 686 US ZIPs (2%). Above this entry. $160,000–$180,000: 364 US ZIPs (1%). Above this entry. $180,000–$200,000: 186 US ZIPs (1%). Above this entry. $200,000–$220,000: 324 US ZIPs (1%). Above this entry. This ZIP $0 $200K+ every reporting US ZIP, bucketed by value

Each bar is a $20K-wide band; taller bars hold more US 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?

High School Graduate or Higher 57.7%
Bachelor's Degree or Higher 28.9%

Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)

What does housing look like?

9,118

Total Housing Units

8,729

Occupied Units

389

Vacant Units

2.58

Avg Household Size

Occupancy Type

Owner 64.5%
Renter 35.5%

$211,100

Median Home Value

+20% vs state

$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.

residents

What this shows Among its immediate neighbors, ZIP 51104 ranks #2 by population - useful context the national average alone can't give.

Source U.S. Census Bureau · ACS 5-Year Estimates As of 2019–2023

ZIP 51104 vs its nearest neighbors, by median income

Median household income of this ZIP and the closest reporting ZIP codes within ~10 miles.

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.

Source U.S. Census Bureau · ACS 5-Year Estimates As of 2019–2023
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

More ZIP Codes in Woodbury County

51106 standard
Sioux City, IA
Pop: 26,544
51103 standard
Sioux City, IA
Pop: 17,453
51105 standard
Sioux City, IA
Pop: 10,216
51108 standard
Sioux City, IA
Pop: 5,566
51054 standard
Sergeant Bluff, IA
Pop: 5,110
51109 standard
Sioux City, IA
Pop: 3,098

Related Areas

Woodbury County Sioux City, IA Iowa

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.

Read our methodology to see how this data is sourced, computed, and verified.