PlainZIP

Sioux City, IA · standard

ZIP Code 51109

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

3,098
66/sq mi
$79,034
Median income
$130,900
Median home value
3.4%
Bachelor's or higher

The verdict

Sioux City pairs an above-median household income with among the most affordable home values nationally, in a rural, homeowner-dominated area.

Top 39%
household income, US ZIPs
20th pct
home value, US ZIPs
66
people per sq mi
87%
owner-occupied homes

Source: U.S. Census Bureau ACS 5-Year Estimates (2019–2023). Percentiles rank ZIP 51109 against every reporting US ZIP.

ZIP code 51109 covers 47.0 square miles in Sioux City, Woodbury County, Iowa (a standard USPS delivery area), with a modest 3,098 residents on file, a density of 66 people per square mile, in the Chicago time zone.

ZIP 51109 lands in the middle-income range, with a median household income of $79,034 (3% above the Iowa average), while per-capita income is $37,934. Poverty here runs at 16.1%, with unemployment measured at 1.9%. The typical home here is valued at $130,900 (25% below the state average); renters pay a median of $627 monthly, and 87.0% of units are owner-occupied.

Formal educational attainment runs low here: just 3.4% of adults hold a bachelor's degree or higher, the median age is 39.4, and the average commute is -. To put 51109 in local context, 10 ZIP codes within roughly 10 miles appear further down this page alongside 6 additional ZIPs in Woodbury County, for a geography-aware comparison.

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 51109

Top 5 sectors by establishment count in Sioux City, IA

Which industries have the most business establishments in ZIP 51109.

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 51109, 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

3,098

Population

47.0

Area (sq mi)

66

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 51109?

39.4

Median Age

50.6%

Male

49.4%

Female

8.0%

Foreign-Born

White 74.9%
African American 6.5%
Asian 0.6%
American Indian or Alaska Native 0.1%
Native Hawaiian or Pacific Islander 0.0%
Two or More Ethnicities 13.7%
Hispanic or Latino 23.3%

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?

$79,034

Median Household Income

+3% vs state

$37,934

Per Capita Income

16.1%

Poverty Rate

1.9%

Unemployment Rate

How ZIP 51109 ranks nationally

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

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

$79,034 Top 39% higher than 61% 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 43.5%
Bachelor's Degree or Higher 3.4%

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

What does housing look like?

1,488

Total Housing Units

1,447

Occupied Units

41

Vacant Units

2.49

Avg Household Size

Occupancy Type

Owner 87.0%
Renter 13.0%

$130,900

Median Home Value

-25% vs state

$627

Median Rent

1960

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

-4.1%

YoY Change (2024)

218

HPI Index (2000 = 100)

+118%

Total Change Since 2000

Home values in ZIP 51109 have decreased 4.1% over the past year (2024). Since 2000, this ZIP has seen +118% cumulative appreciation.

Year Annual Change HPI Index
2020 +5.7% 167
2021 +11.8% 187
2022 +12.4% 210
2023 +8.3% 227
2024 -4.1% 218

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 57 business establishments in ZIP 51109, employing approximately 349 people with a combined annual payroll of $9,468,000.

57

Businesses

349

Employees

$9.5M

Annual Payroll

6

Industry Sectors

Industry Establishments % of Total
Retail trade 16 28.1%
Other services (except public administration) 11 19.3%
Accommodation and food services 6 10.5%
Construction 5 8.8%
Health care and social assistance 5 8.8%
Arts, entertainment, and recreation 3 5.3%

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 51109 vs 57049 →

ZIP 51109 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 51109 ranks #7 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 51109 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 51109 ranks #4 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
57049 North Sioux City, SD 5,789 5.1 mi
51103 Sioux City, IA 17,453 5.6 mi
57038 Jefferson, SD 1,667 5.3 mi
51104 Sioux City, IA 22,104 5.6 mi
51108 Sioux City, IA 5,566 6.7 mi
51062 Westfield, IA 526 8.3 mi
68776 South Sioux City, NE 15,447 9.5 mi
51101 Sioux City, IA 809 8.2 mi
51105 Sioux City, IA 10,216 8.2 mi
68743 Jackson, NE 693 11.7 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
51105 standard
Sioux City, IA
Pop: 10,216
51108 standard
Sioux City, IA
Pop: 5,566
51054 standard
Sergeant Bluff, IA
Pop: 5,110

Related Areas

Woodbury County Sioux City, IA Iowa

Frequently Asked Questions

What county is ZIP code 51109 in? ▼
ZIP code 51109 (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 51109? ▼
ZIP code 51109 in Sioux City, IA has a population of 3,098 according to the Census Bureau ACS 2023 estimates.
What is the median household income in ZIP 51109? ▼
The median household income in ZIP 51109 is $79,034, which is 4% above the national average of $76,288.
What is the average home value in ZIP 51109? ▼
The median home value in ZIP 51109 is $130,900, which is 53% below the national average of $278,155.
What is the demographic makeup of ZIP 51109? ▼
The largest racial group in ZIP 51109 is White at 74.9%. Hispanic or Latino residents make up 23.3% of the population.
How many businesses are in ZIP code 51109? ▼
ZIP code 51109 has 57 business establishments employing approximately 349 people, according to Census Bureau ZIP Code Business Patterns (ZBP) 2023 data.
What are the main industries in ZIP code 51109? ▼
The top industries by establishment count in ZIP 51109 are: Retail trade (16), Other services (except public administration) (11), Accommodation and food services (6). There are 6 industry sectors represented in total.
How have home values changed in ZIP code 51109? ▼
According to the FHFA House Price Index, home values in ZIP 51109 decreased by 4.1% in 2024. Since 2000, home values in this ZIP have appreciated by approximately 118%. 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 51109? ▼
In ZIP code 51109, 43.5% of residents aged 25+ have a high school diploma or higher, and 3.4% hold a bachelor's degree or higher. These figures come from the Census Bureau ACS 5-Year Estimates (2023).
What percentage of residents own vs. rent in ZIP 51109? ▼
In ZIP code 51109, approximately 87.0% of occupied housing units are owner-occupied and 13.0% are renter-occupied, based on Census ACS 2023 data.
What is the poverty rate in ZIP code 51109? ▼
The poverty rate in ZIP code 51109 is 16.1% 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.