Zip code 51104: Sioux City, Iowa

Q: What city is zip code 51104?

51104 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 51104 in?

51104 is in Woodbury County, Iowa.

Q: What is the population of 51104?

About 23,197 people live in 51104, according to the Census Bureau's American Community Survey.

Q: What is the median household income in 51104?

The median household income in 51104 is $75,362.

Q: What zip codes are near 51104?

The closest zip codes to 51104 are 51103, 51105, 51101, 51108, 57049.

Residential delivery areaWoodbury CountyCentral Time

Population

23,197

Median household income

$75K

U.S. $81K

Median home value

$211K

U.S. $333K

Median rent

$998/mo

U.S. $1,413

Median age

37.5

U.S. 38.9

Land area

7.5 sq mi

3,103 people/sq mi

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

About 51104

51104 is an urban zip code in Sioux City, Iowa (Woodbury County), covering 7.5 sq mi of land. About 23,197 people live here, or 3,103 per square mile. The median resident is 37.5 years old, compared with 38.9 nationally.

The median household earns $75,362 a year, close to the national median of $80,734. 10.4% of residents live below the poverty line (U.S.: 12.5%). A typical home is valued at $211,100, or 2.8 years of median household income (U.S.: 4.1 years), which makes homes relatively affordable for local earners. 65% of occupied homes are lived in by their owners, and renters pay a median of $998 a month.

29% of adults hold a bachelor's degree or higher (U.S.: 36%). Commuters average 18.5 minutes each way, and 5% of workers work from home. The most common jobs among working residents are in management; transportation and moving goods; and production and manufacturing.

How 51104 compares

Sorted from highest to lowest national percentile

Population density3,103/sq mi
68th
U.S. 95/sq mi · IA 58/sq mi14th of 911 in IA
Uninsured rate8.7%
64th
U.S. 8.4% · IA 5%113th of 911 in IA
Residents under 1823.7%
64th
U.S. 22% · IA 22.9%423rd of 911 in IA
Diversity index55.4
62nd
U.S. 61.4 · IA 31.419th of 911 in IA
Foreign-born residents11.5%
55th
U.S. 14.1% · IA 5.9%42nd of 911 in IA
Poverty rate10.4%
47th
U.S. 12.5% · IA 11.1%336th of 909 in IA
Unemployment rate4.6%
45th
U.S. 5.2% · IA 3.6%184th of 911 in IA
Government workers13.1%
45th
U.S. 14.5% · IA 14.5%460th of 911 in IA
Median household income$75,362
44th
U.S. $80,734 · IA $75,059430th of 896 in IA
Median earnings per worker$46,288
44th
U.S. $49,666 · IA $47,712515th of 910 in IA
Bachelor's degree or higher28.9%
43rd
U.S. 35.7% · IA 31.4%194th of 911 in IA
Residents 65 and older15.6%
43rd
U.S. 17.2% · IA 18.1%713th of 911 in IA
Homeownership rate64.5%
41st
U.S. 65.2% · IA 71.7%851st of 909 in IA
Per capita income$36,752
40th
U.S. $44,673 · IA $40,877544th of 911 in IA
Veterans5.1%
40th
U.S. 6.2% · IA 6.5%678th of 911 in IA
Median age37.5
38th
U.S. 38.9 · IA 38.6716th of 911 in IA
Population23,197
37th
U.S. 334,922,499 · IA 3,210,50736th of 911 in IA
Self-employed workers7.8%
29th
U.S. 10% · IA 10.2%745th of 911 in IA
Housing vacancy4.3%
25th
U.S. 10.1% · IA 8.5%724th of 909 in IA
Median home value$211,100
23rd
U.S. $332,700 · IA $208,000235th of 881 in IA
Broadband access87.9%
23rd
U.S. 91% · IA 88.9%509th of 909 in IA
Healthcare workers7.6%
22nd
U.S. 9.7% · IA 9.2%536th of 911 in IA
Median gross rent$998
21st
U.S. $1,413 · IA $972152nd of 771 in IA
Income inequality (Gini)0.399
20th
StrengthU.S. 0.483 · IA 0.444432nd of 908 in IA
Tech workers1.3%
18th
U.S. 3.8% · IA 2.9%347th of 911 in IA
Rent-burdened renters39.8%
15th
StrengthU.S. 51.1% · IA 43.9%345th of 882 in IA
Average commute18.5 min
7th
StrengthU.S. 26.4 min · IA 19.8 min721st of 902 in IA
Work from home4.5%
6th
U.S. 15.1% · IA 11.3%729th of 911 in IA

Measure	51104	Woodbury	IA	U.S.	National percentile	Rank in IA
Population density	3,103/sq mi	122/sq mi	58/sq mi	95/sq mi	68th	14th of 911
Uninsured rate	8.7%	7.3%	5%	8.4%	64th	113th of 911
Residents under 18	23.7%	25.8%	22.9%	22%	64th	423rd of 911
Diversity index	55.4	50.8	31.4	61.4	62nd	19th of 911
Foreign-born residents	11.5%	10.6%	5.9%	14.1%	55th	42nd of 911
Poverty rate	10.4%	14%	11.1%	12.5%	47th	336th of 909
Unemployment rate	4.6%	4.1%	3.6%	5.2%	45th	184th of 911
Government workers	13.1%	11.6%	14.5%	14.5%	45th	460th of 911
Median household income	$75,362	$73,658	$75,059	$80,734	44th	430th of 896
Median earnings per worker	$46,288	$44,867	$47,712	$49,666	44th	515th of 910
Bachelor's degree or higher	28.9%	24.3%	31.4%	35.7%	43rd	194th of 911
Residents 65 and older	15.6%	15.9%	18.1%	17.2%	43rd	713th of 911
Homeownership rate	64.5%	68.2%	71.7%	65.2%	41st	851st of 909
Per capita income	$36,752	$35,564	$40,877	$44,673	40th	544th of 911
Veterans	5.1%	5.7%	6.5%	6.2%	40th	678th of 911
Median age	37.5	36.1	38.6	38.9	38th	716th of 911
Population	23,197	106,247	3,210,507	334,922,499	37th	36th of 911
Self-employed workers	7.8%	8.5%	10.2%	10%	29th	745th of 911
Housing vacancy	4.3%	6.2%	8.5%	10.1%	25th	724th of 909
Median home value	$211,100	$183,200	$208,000	$332,700	23rd	235th of 881
Broadband access	87.9%	87.3%	88.9%	91%	23rd	509th of 909
Healthcare workers	7.6%	8.8%	9.2%	9.7%	22nd	536th of 911
Median gross rent	$998	$981	$972	$1,413	21st	152nd of 771
Income inequality (Gini)Strength	0.399	0.436	0.444	0.483	20th	432nd of 908
Tech workers	1.3%	1.1%	2.9%	3.8%	18th	347th of 911
Rent-burdened rentersStrength	39.8%	42.5%	43.9%	51.1%	15th	345th of 882
Average commuteStrength	18.5 min	18.1 min	19.8 min	26.4 min	7th	721st of 902
Work from home	4.5%	5.6%	11.3%	15.1%	6th	729th of 911

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

16%

5–17

11%

18–24

13%

25–34

15%

35–44

10%

45–54

12%

55–64

65–74

75+

Median age

37.5

Under 18

23.7%

65 and over

15.6%

Race and ethnicity

White63%
Black5%
Hispanic20%
Asian3%
Native American1%
Pacific Islander2%
Other0.1%
Multiracial4%

Diversity index

55.4

U.S. 61.4

Foreign-born

11.5%

U.S. 14.1%

Born in state

63.9%

Language spoken at home (households)

English only

81%

Spanish

12%

Other Indo-European

Asian / Pacific

Other

Households

Households: 8,729
Average household size: 2.6
Family households: 67%
Married couples: 44.2%
Living alone: 26.5%
Veterans (of adults): 5.1%
Male / female: 49% / 51%

Income and poverty

Household income distribution

<$25k

13%

$25–50k

18%

$50–75k

19%

$75–100k

13%

$100–150k

18%

$150–200k

14%

$200k+

Median household income

51104

$75,362

Woodbury Co.

$73,658

Iowa

$75,059

United States

$80,734

Per capita income

$36,752

U.S. $44,673

Poverty rate

10.4%

U.S. 12.5%

Households earning $150K+

18.9%

U.S. 23%

Income inequality (Gini)

0.399

U.S. 0.483

Housing

Median home value

51104

$211,100

Woodbury Co.

$183,200

Iowa

$208,000

United States

$332,700

Median gross rent

51104

$998

Woodbury Co.

$981

Iowa

$972

United States

$1,413

Types of housing

Single-family

76%

2–4 units

5–19 units

20+ units

Mobile home

0.5%

Boat, RV, van

0.1%

Housing units: 9,118
Owner-occupied: 64.5%
Vacant: 4.3%
Median year built: 1959
Median rooms: 6
Renters paying 30%+ of income: 39.8%
Renters paying 50%+ of income: 20.5%
Home value to income: 2.8× (U.S. 4.1×)

Work and commute

How people get to work

Drove alone

81%

Carpooled

11%

Transit

Walked

0.3%

Bicycle

0.0%

Worked from home

Other

Commute time (one way)

<10 min

21%

10–19

43%

20–29

22%

30–44

45–59

60+

Average commute

18.5 min

U.S. 26.4 min

Unemployment

4.6%

U.S. 5.2%

In labor force

69.6%

U.S. 63.5%

Jobs and careers

What employed residents do, wherever they work

Occupations

Management

12%

Transportation and moving

11%

Production

11%

Office and admin

Education

Healthcare

Sales

Construction and repair

Cleaning and personal care

Food service

Business and finance

Legal and social services

Arts, media and sports

Engineering and science

Computer and math

Police and fire

Farming, fishing and forestry

0.2%

Industries

Manufacturing

17%

Health care and social assistance

14%

Education

10%

Retail

10%

Restaurants and hotels

Construction

Transportation, warehousing and utilities

Other services

Finance, insurance and real estate

Professional and technical services

Public administration

Admin, support and management

Arts and recreation

Wholesale

Agriculture and mining

Information

Median earnings per worker

$46,288

U.S. $49,666

Self-employed

7.8%

U.S. 10%

Government workers

13.1%

U.S. 14.5%

Nonprofit workers

11.6%

U.S. 8.8%

Median earnings by type of work

Type of work	51104	U.S.
Management, business, science and arts	$63,255	$74,888
Service	$17,609	$26,804
Sales and office	$40,397	$40,476
Construction and maintenance	$46,524	$49,199
Production and transportation	$45,678	$39,989

Education, internet and health coverage

Highest education (adults 25+)

No diploma

11%

High school

29%

Some college

19%

Associate's

12%

Bachelor's

20%

Graduate

High school graduate or higher: 89.2%
Bachelor's degree or higher: 28.9%
Graduate or professional degree: 8.6%
Households with broadband: 87.9%
Cable, fiber or DSL: 76.9%
No internet access: 6.3%
Without health insurance: 8.7%
Limited-English households: 5.9%

Geography

City (USPS): Sioux City
State: Iowa
County: Woodbury County
Center point: 42.5345° N, 96.4032° W
Land area: 7.5 sq mi
Water area: under 0.1 sq mi
Time zone: Central Time (UTC-6, UTC-5 in summer)
Zip type: Residential delivery area

Cities and towns within this zip

Sioux City100% of zip

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

Zip codes near 51104

Search by radius

Zip	City	Distance	Population	IncomeMedian income	Home value
51103	Sioux City, IA	2.6 mi	16,895	$58,197	$142,900
51105	Sioux City, IA	2.6 mi	10,415	$51,786	$96,200
51101	Sioux City, IA	2.9 mi	1,031	$15,300	—
51108	Sioux City, IA	3.4 mi	5,960	$81,205	$169,700
57049	North Sioux City, SD	5.5 mi	7,962	$93,134	$432,100
68776	South Sioux City, NE	5.6 mi	15,373	$68,750	$179,800
51109	Sioux City, IA	6.2 mi	3,606	$79,034	$130,900
51106	Sioux City, IA	6.7 mi	28,592	$78,434	$200,200
51111	Sioux City, IA	8 mi	39	—	—
57038	Jefferson, SD	9.3 mi	1,796	$106,250	$332,300
51024	Hinton, IA	9.6 mi	2,081	$114,219	$347,800
68731	Dakota City, NE	9.9 mi	3,469	$79,924	$205,600

Zip codes like 51104 elsewhere

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

Questions about 51104

What city is zip code 51104?

51104 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 51104 in?

51104 is in Woodbury County, Iowa.

What is the population of 51104?

About 23,197 people live in 51104, according to the Census Bureau's American Community Survey.

What time zone is 51104 in?

51104 is in Central Time.

What is the median household income in 51104?

The median household income in 51104 is $75,362.

What zip codes are near 51104?

The closest zip codes to 51104 are 51103, 51105, 51101, 51108, 57049.

Demographic figures are 2020–2024 American Community Survey 5-year estimates for ZIP Code Tabulation Area 51104, from the U.S. Census Bureau. Small areas have wide margins of error. How we build these numbers.