PlainZIP

Sioux City, IA · standard

ZIP Code 51105

Woodbury County, Iowa - Census ACS demographics, housing tenure, and business patterns, benchmarked against every US ZIP.

10,216
649/sq mi
$51,786
Median income
$96,200
Median home value
7.8%
Bachelor's or higher

The verdict

Sioux City pairs one of the lowest household incomes in the country with among the most affordable home values nationally, in a low-density, mixed-tenure area.

17th pct
household income, US ZIPs
9th pct
home value, US ZIPs
649
people per sq mi
48%
owner-occupied homes

Source: U.S. Census Bureau ACS 5-Year Estimates (2019–2023). Percentiles rank ZIP 51105 against every reporting US ZIP.

ZIP code 51105 is a mid-sized community (a standard USPS delivery area) in Sioux City, Woodbury County, Iowa, home to 10,216 residents across 15.8 square miles, a density of 649 people per square mile, in the Chicago time zone.

ZIP 51105 reports a modest median household income of $51,786 (32% below the Iowa average), while per-capita income is $24,008. The poverty rate stands at 21.6% and the unemployment rate at 6.2%. Housing costs here run $96,200 for a typical home value (45% below the state average), with rent averaging $859 a month; 48.2% of homes are owner-occupied.

Formal educational attainment runs low here: just 7.8% of adults hold a bachelor's degree or higher, the median age is 29.6, and the average commute is 17 minutes. Beyond these figures, 10 nearby ZIP codes within about 10 miles are surfaced below, along with 6 more sharing Woodbury County, letting you compare 51105 to its immediate surroundings rather than a national baseline 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 51105

Top 5 sectors by establishment count in Sioux City, IA

Which industries have the most business establishments in ZIP 51105.

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 51105, 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

10,216

Population

15.8

Area (sq mi)

649

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 51105?

29.6

Median Age

53.9%

Male

46.1%

Female

24.0%

Foreign-Born

White 49.0%
African American 9.1%
Asian 2.4%
American Indian or Alaska Native 3.7%
Native Hawaiian or Pacific Islander 0.1%
Two or More Ethnicities 31.0%
Hispanic or Latino 37.0%

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?

$51,786

Median Household Income

-32% vs state

$24,008

Per Capita Income

21.6%

Poverty Rate

6.2%

Unemployment Rate

16.9 min

Mean Commute Time

How ZIP 51105 ranks nationally

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

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

$51,786 17th percentile higher than 17% 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%). This entry sits in this band. $60,000–$80,000: 9,980 US ZIPs (33%). Above this entry. $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 44.2%
Bachelor's Degree or Higher 7.8%

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

What does housing look like?

4,053

Total Housing Units

3,596

Occupied Units

457

Vacant Units

2.89

Avg Household Size

Occupancy Type

Owner 48.2%
Renter 51.8%

$96,200

Median Home Value

-45% vs state

$859

Median Rent

1938

Median Year Built

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

What businesses operate in this ZIP?

Census Bureau data shows 218 business establishments in ZIP 51105, employing approximately 3,286 people with a combined annual payroll of $166,710,000.

218

Businesses

3,286

Employees

$166.7M

Annual Payroll

14

Industry Sectors

Industry Establishments % of Total
Retail trade 44 20.2%
Health care and social assistance 26 11.9%
Construction 25 11.5%
Wholesale trade 23 10.6%
Other services (except public administration) 18 8.3%
Accommodation and food services 17 7.8%
Administrative and support and waste management and remediation services 15 6.9%
Manufacturing 11 5.0%
Real estate and rental and leasing 9 4.1%
Professional, scientific, and technical services 7 3.2%
Transportation and warehousing 6 2.8%
Finance and insurance 6 2.8%
Information 4 1.8%
Educational services 3 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 51105 vs 51101 →

ZIP 51105 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 51105 ranks #5 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 51105 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 51105 ranks #9 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 1.7 mi
51104 Sioux City, IA 22,104 2.7 mi
51108 Sioux City, IA 5,566 4.1 mi
51103 Sioux City, IA 17,453 3.9 mi
51106 Sioux City, IA 26,544 3.7 mi
51111 Sioux City, IA 94 6.9 mi
68776 South Sioux City, NE 15,447 5.1 mi
57049 North Sioux City, SD 5,789 7.3 mi
51054 Sergeant Bluff, IA 5,110 9.1 mi
51109 Sioux City, IA 3,098 8.2 mi

More ZIP Codes in Woodbury County

51106 standard
Sioux City, IA
Pop: 26,544
51104 standard
Sioux City, IA
Pop: 22,104
51103 standard
Sioux City, IA
Pop: 17,453
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 51105 in? ▼
ZIP code 51105 (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 51105? ▼
ZIP code 51105 in Sioux City, IA has a population of 10,216 according to the Census Bureau ACS 2023 estimates.
What is the median household income in ZIP 51105? ▼
The median household income in ZIP 51105 is $51,786, which is 32% below the national average of $76,288.
What is the average home value in ZIP 51105? ▼
The median home value in ZIP 51105 is $96,200, which is 65% below the national average of $278,155.
What is the demographic makeup of ZIP 51105? ▼
The largest racial group in ZIP 51105 is White at 49.0%. Hispanic or Latino residents make up 37.0% of the population.
How many businesses are in ZIP code 51105? ▼
ZIP code 51105 has 218 business establishments employing approximately 3,286 people, according to Census Bureau ZIP Code Business Patterns (ZBP) 2023 data.
What are the main industries in ZIP code 51105? ▼
The top industries by establishment count in ZIP 51105 are: Retail trade (44), Health care and social assistance (26), Construction (25). There are 14 industry sectors represented in total.
What is the education level in ZIP code 51105? ▼
In ZIP code 51105, 44.2% of residents aged 25+ have a high school diploma or higher, and 7.8% 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 51105? ▼
The mean commute time for workers in ZIP code 51105 is 16.9 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 51105? ▼
In ZIP code 51105, approximately 48.2% of occupied housing units are owner-occupied and 51.8% are renter-occupied, based on Census ACS 2023 data.
What is the poverty rate in ZIP code 51105? ▼
The poverty rate in ZIP code 51105 is 21.6% 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.