Zip code 51109: Sioux City, Iowa

Q: What city is zip code 51109?

51109 is assigned to Sioux City, Iowa. The city name is the one the Postal Service prefers for mail addressed to this zip code.

Q: What county is 51109 in?

51109 is mostly in Plymouth County, but it extends into 1 other county.

Q: What is the population of 51109?

About 3,606 people live in 51109, according to the Census Bureau's American Community Survey.

Q: What is the median household income in 51109?

The median household income in 51109 is $79,034.

Q: What zip codes are near 51109?

The closest zip codes to 51109 are 57038, 51104, 57049, 51103, 51108.

Residential delivery areaPlymouth CountyCentral Time

Population

3,606

Median household income

$79K

U.S. $81K

Median home value

$131K

U.S. $333K

Median rent

$627/mo

U.S. $1,413

Median age

39.4

U.S. 38.9

Land area

18 sq mi

205 people/sq mi

Boundary is the Census Bureau's ZIP Code Tabulation Area, which closely tracks the postal delivery area.

About 51109

51109 is a small-town zip code in Sioux City, Iowa (Plymouth County), covering 18 sq mi of land. About 3,606 people live here, or 205 per square mile. The median resident is 39.4 years old, compared with 38.9 nationally.

The median household earns $79,034 a year, close to the national median of $80,734. 16.1% of residents live below the poverty line (U.S.: 12.5%). A typical home is valued at $130,900, or 1.7 years of median household income (U.S.: 4.1 years), which makes homes relatively affordable for local earners. 87% of occupied homes are lived in by their owners, and renters pay a median of $627 a month.

3% of adults hold a bachelor's degree or higher (U.S.: 36%). Commuters average 16.4 minutes each way, and 4% of workers work from home. The most common jobs among working residents are in construction and repair; production and manufacturing; and management.

How 51109 compares

Sorted from highest to lowest national percentile

Homeownership rate87%
92nd
StrengthU.S. 65.2% · IA 71.7%266th of 909 in IA
Poverty rate16.1%
73rd
U.S. 12.5% · IA 11.1%141st of 909 in IA
Self-employed workers11.1%
70th
U.S. 10% · IA 10.2%574th of 911 in IA
Uninsured rate9.6%
69th
U.S. 8.4% · IA 5%93rd of 911 in IA
Residents under 1824.2%
68th
U.S. 22% · IA 22.9%377th of 911 in IA
Veterans7.1%
67th
U.S. 6.2% · IA 6.5%423rd of 911 in IA
Healthcare workers10.2%
61st
U.S. 9.7% · IA 9.2%298th of 911 in IA
Residents 65 and older17.8%
59th
U.S. 17.2% · IA 18.1%608th of 911 in IA
Government workers14.3%
55th
U.S. 14.5% · IA 14.5%385th of 911 in IA
Median age39.4
53rd
U.S. 38.9 · IA 38.6633rd of 911 in IA
Median earnings per worker$49,157
53rd
U.S. $49,666 · IA $47,712370th of 910 in IA
Median household income$79,034
49th
U.S. $80,734 · IA $75,059352nd of 896 in IA
Diversity index46.9
46th
U.S. 61.4 · IA 31.442nd of 911 in IA
Per capita income$37,934
44th
U.S. $44,673 · IA $40,877475th of 911 in IA
Foreign-born residents8%
43rd
U.S. 14.1% · IA 5.9%77th of 911 in IA
Broadband access88.5%
26th
U.S. 91% · IA 88.9%462nd of 909 in IA
Population density205/sq mi
21st
U.S. 95/sq mi · IA 58/sq mi136th of 911 in IA
Tech workers1.3%
18th
U.S. 3.8% · IA 2.9%349th of 911 in IA
Income inequality (Gini)0.382
11th
StrengthU.S. 0.483 · IA 0.444540th of 908 in IA
Housing vacancy2.8%
9th
U.S. 10.1% · IA 8.5%789th of 909 in IA
Median home value$130,900
7th
U.S. $332,700 · IA $208,000613th of 881 in IA
Population3,606
6th
U.S. 334,922,499 · IA 3,210,507173rd of 911 in IA
Unemployment rate1.9%
5th
StrengthU.S. 5.2% · IA 3.6%515th of 911 in IA
Work from home3.7%
4th
U.S. 15.1% · IA 11.3%766th of 911 in IA
Average commute16.4 min
3rd
StrengthU.S. 26.4 min · IA 19.8 min814th of 902 in IA
Median gross rent$627
2nd
U.S. $1,413 · IA $972680th of 771 in IA
Bachelor's degree or higher3.4%
1st
WeaknessU.S. 35.7% · IA 31.4%895th of 911 in IA
Rent-burdened renters6.9%
1st
StrengthU.S. 51.1% · IA 43.9%775th of 882 in IA

Measure	51109	Plymouth	IA	U.S.	National percentile	Rank in IA
Homeownership rateStrength	87%	73.6%	71.7%	65.2%	92nd	266th of 909
Poverty rate	16.1%	6.9%	11.1%	12.5%	73rd	141st of 909
Self-employed workers	11.1%	13.2%	10.2%	10%	70th	574th of 911
Uninsured rate	9.6%	5.3%	5%	8.4%	69th	93rd of 911
Residents under 18	24.2%	25%	22.9%	22%	68th	377th of 911
Veterans	7.1%	6.9%	6.5%	6.2%	67th	423rd of 911
Healthcare workers	10.2%	9.5%	9.2%	9.7%	61st	298th of 911
Residents 65 and older	17.8%	19.8%	18.1%	17.2%	59th	608th of 911
Government workers	14.3%	11.9%	14.5%	14.5%	55th	385th of 911
Median age	39.4	41.3	38.6	38.9	53rd	633rd of 911
Median earnings per worker	$49,157	$49,734	$47,712	$49,666	53rd	370th of 910
Median household income	$79,034	$83,251	$75,059	$80,734	49th	352nd of 896
Diversity index	46.9	22	31.4	61.4	46th	42nd of 911
Per capita income	$37,934	$41,532	$40,877	$44,673	44th	475th of 911
Foreign-born residents	8%	3.7%	5.9%	14.1%	43rd	77th of 911
Broadband access	88.5%	89.8%	88.9%	91%	26th	462nd of 909
Population density	205/sq mi	30/sq mi	58/sq mi	95/sq mi	21st	136th of 911
Tech workers	1.3%	1.2%	2.9%	3.8%	18th	349th of 911
Income inequality (Gini)Strength	0.382	0.407	0.444	0.483	11th	540th of 908
Housing vacancy	2.8%	5.3%	8.5%	10.1%	9th	789th of 909
Median home value	$130,900	$228,900	$208,000	$332,700	7th	613th of 881
Population	3,606	25,747	3,210,507	334,922,499	6th	173rd of 911
Unemployment rateStrength	1.9%	2.2%	3.6%	5.2%	5th	515th of 911
Work from home	3.7%	9.2%	11.3%	15.1%	4th	766th of 911
Average commuteStrength	16.4 min	19.2 min	19.8 min	26.4 min	3rd	814th of 902
Median gross rent	$627	$910	$972	$1,413	2nd	680th of 771
Bachelor's degree or higherWeakness	3.4%	21.7%	31.4%	35.7%	1st	895th of 911
Rent-burdened rentersStrength	6.9%	30.6%	43.9%	51.1%	1st	775th of 882

The percentile is the share of Americans who live in a zip code with a lower value, so the 50th percentile is typical. Rank 1 is the highest value in the state. Both include zip codes with at least 100 residents. Strengths and weaknesses mark measures in the best or worst fifth nationally, where higher or lower is clearly better (income, poverty, education, commute, broadband, insurance and similar). Measures like age or density are left unmarked.

People

Age

Under 5

17%

5–17

13%

18–24

11%

25–34

10%

35–44

13%

45–54

11%

55–64

10%

65–74

75+

Median age

39.4

Under 18

24.2%

65 and over

17.8%

Race and ethnicity

White69%
Black7%
Hispanic23%
Asian0.1%
Native American0.1%
Pacific Islander0%
Other0%
Multiracial1%

Diversity index

46.9

U.S. 61.4

Foreign-born

U.S. 14.1%

Born in state

70.3%

Language spoken at home (households)

English only

82%

Spanish

16%

Other Indo-European

Asian / Pacific

0.4%

Other

0.3%

Households

Households: 1,447
Average household size: 2.5
Family households: 55.8%
Married couples: 38.1%
Living alone: 37.6%
Veterans (of adults): 7.1%
Male / female: 51% / 49%

Income and poverty

Household income distribution

<$25k

$25–50k

27%

$50–75k

12%

$75–100k

21%

$100–150k

18%

$150–200k

$200k+

Median household income

51109

$79,034

Plymouth Co.

$83,251

Iowa

$75,059

United States

$80,734

Per capita income

$37,934

U.S. $44,673

Poverty rate

16.1%

U.S. 12.5%

Households earning $150K+

11.7%

U.S. 23%

Income inequality (Gini)

0.382

U.S. 0.483

Housing

Median home value

51109

$130,900

Plymouth Co.

$228,900

Iowa

$208,000

United States

$332,700

Median gross rent

51109

$627

Plymouth Co.

$910

Iowa

$972

United States

$1,413

Types of housing

Single-family

90%

2–4 units

5–19 units

20+ units

Mobile home

0.9%

Boat, RV, van

Housing units: 1,488
Owner-occupied: 87%
Vacant: 2.8%
Median year built: 1960
Median rooms: 5.3
Renters paying 30%+ of income: 6.9%
Renters paying 50%+ of income: 6.9%
Home value to income: 1.7× (U.S. 4.1×)

Work and commute

How people get to work

Drove alone

88%

Carpooled

Transit

Walked

Bicycle

Worked from home

Other

0.7%

Commute time (one way)

<10 min

12%

10–19

69%

20–29

14%

30–44

45–59

60+

Average commute

16.4 min

U.S. 26.4 min

Unemployment

1.9%

U.S. 5.2%

In labor force

66.1%

U.S. 63.5%

Jobs and careers

What employed residents do, wherever they work

Occupations

Construction and repair

16%

Production

12%

Management

11%

Healthcare

10%

Office and admin

Food service

Education

Transportation and moving

Sales

Business and finance

Cleaning and personal care

Arts, media and sports

Computer and math

Farming, fishing and forestry

0.9%

Legal and social services

0.9%

Police and fire

0.6%

Engineering and science

0.5%

Industries

Manufacturing

16%

Health care and social assistance

15%

Education

11%

Finance, insurance and real estate

Professional and technical services

Retail

Restaurants and hotels

Other services

Transportation, warehousing and utilities

Construction

Admin, support and management

Agriculture and mining

Public administration

0.7%

Wholesale

0.4%

Information

Arts and recreation

Median earnings per worker

$49,157

U.S. $49,666

Self-employed

11.1%

U.S. 10%

Government workers

14.3%

U.S. 14.5%

Nonprofit workers

4.3%

U.S. 8.8%

Median earnings by type of work

Type of work	51109	U.S.
Management, business, science and arts	$51,133	$74,888
Service	$27,955	$26,804
Sales and office	$29,712	$40,476
Construction and maintenance	$60,811	$49,199
Production and transportation	$55,707	$39,989

Education, internet and health coverage

Highest education (adults 25+)

No diploma

14%

High school

40%

Some college

27%

Associate's

15%

Bachelor's

Graduate

High school graduate or higher: 85.6%
Bachelor's degree or higher: 3.4%
Graduate or professional degree: 1.5%
Households with broadband: 88.5%
Cable, fiber or DSL: 61.5%
No internet access: 11.5%
Without health insurance: 9.6%
Limited-English households: 3.5%

Geography

City (USPS): Sioux City
State: Iowa
County: Plymouth County
Center point: 42.6103° N, 96.4700° W
Land area: 18 sq mi
Water area: 0.8 sq mi
Time zone: Central Time (UTC-6, UTC-5 in summer)
Zip type: Residential delivery area

51109 spans 2 counties

Plymouth County90% of land
Woodbury County10% of land

Cities and towns within this zip

Sioux City10% of zip

Census places overlapping the zip's area. Mail may use a different city name than the municipality.

Zip codes near 51109

Search by radius

Zip	City	Distance	Population	IncomeMedian income	Home value
57038	Jefferson, SD	5.9 mi	1,796	$106,250	$332,300
51104	Sioux City, IA	6.2 mi	23,197	$75,362	$211,100
57049	North Sioux City, SD	6.3 mi	7,962	$93,134	$432,100
51103	Sioux City, IA	6.3 mi	16,895	$58,197	$142,900
51108	Sioux City, IA	6.7 mi	5,960	$81,205	$169,700
51062	Westfield, IA	6.9 mi	503	—	$250,000
51105	Sioux City, IA	8.8 mi	10,415	$51,786	$96,200
51101	Sioux City, IA	8.9 mi	1,031	$15,300	—
51038	Merrill, IA	10 mi	1,449	$95,893	$183,100
68776	South Sioux City, NE	11 mi	15,373	$68,750	$179,800
51024	Hinton, IA	11 mi	2,081	$114,219	$347,800
68743	Jackson, NE	12 mi	814	$71,667	$208,200

Zip codes like 51109 elsewhere

Matched on income, home values, age, density, education, housing and commuting

Questions about 51109

What city is zip code 51109?

51109 is assigned to Sioux City, Iowa. The city name is the one the Postal Service prefers for mail addressed to this zip code.

What county is 51109 in?

51109 is mostly in Plymouth County, but it extends into 1 other county.

What is the population of 51109?

About 3,606 people live in 51109, according to the Census Bureau's American Community Survey.

What time zone is 51109 in?

51109 is in Central Time.

What is the median household income in 51109?

The median household income in 51109 is $79,034.

What zip codes are near 51109?

The closest zip codes to 51109 are 57038, 51104, 57049, 51103, 51108.

Demographic figures are 2020–2024 American Community Survey 5-year estimates for ZIP Code Tabulation Area 51109, from the U.S. Census Bureau. Small areas have wide margins of error. How we build these numbers.