Zip code 51101: Sioux City, Iowa

Q: What city is zip code 51101?

51101 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 51101 in?

51101 is in Woodbury County, Iowa.

Q: What is the population of 51101?

About 1,031 people live in 51101, according to the Census Bureau's American Community Survey.

Q: What is the median household income in 51101?

The median household income in 51101 is $15,300.

Q: What zip codes are near 51101?

The closest zip codes to 51101 are 51105, 51104, 51103, 68776, 51106.

Residential delivery areaWoodbury CountyCentral Time

Population

1,031

Median household income

$15K

U.S. $81K

Median home value

—

U.S. $333K

Median rent

$708/mo

U.S. $1,413

Median age

40.8

U.S. 38.9

Land area

1.2 sq mi

857 people/sq mi

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

About 51101

51101 is a suburban zip code in Sioux City, Iowa (Woodbury County), covering 1.2 sq mi of land. About 1,031 people live here, or 857 per square mile. The median resident is 40.8 years old, compared with 38.9 nationally.

The median household earns $15,300 a year, about 19% of the national median of $80,734. 48.1% of residents live below the poverty line (U.S.: 12.5%). 3% of occupied homes are lived in by their owners, and renters pay a median of $708 a month.

11% of adults hold a bachelor's degree or higher (U.S.: 36%). Commuters average 10.8 minutes each way, and 3% of workers work from home. The most common jobs among working residents are in food service; management; and office and administrative support.

How 51101 compares

Sorted from highest to lowest national percentile

Poverty rate48.1%
99th
WeaknessU.S. 12.5% · IA 11.1%4th of 909 in IA
Unemployment rate14.5%
99th
WeaknessU.S. 5.2% · IA 3.6%12th of 911 in IA
Income inequality (Gini)0.544
97th
WeaknessU.S. 0.483 · IA 0.44420th of 908 in IA
Housing vacancy18.8%
92nd
U.S. 10.1% · IA 8.5%103rd of 909 in IA
Rent-burdened renters59.6%
82nd
WeaknessU.S. 51.1% · IA 43.9%95th of 882 in IA
Veterans8.4%
81st
U.S. 6.2% · IA 6.5%289th of 911 in IA
Uninsured rate12.1%
80th
WeaknessU.S. 8.4% · IA 5%60th of 911 in IA
Median age40.8
63rd
U.S. 38.9 · IA 38.6562nd of 911 in IA
Diversity index53.5
58th
U.S. 61.4 · IA 31.423rd of 911 in IA
Residents 65 and older17.2%
55th
U.S. 17.2% · IA 18.1%638th of 911 in IA
Tech workers2.8%
48th
U.S. 3.8% · IA 2.9%152nd of 911 in IA
Healthcare workers9.3%
47th
U.S. 9.7% · IA 9.2%378th of 911 in IA
Population density857/sq mi
41st
U.S. 95/sq mi · IA 58/sq mi64th of 911 in IA
Foreign-born residents6.4%
36th
U.S. 14.1% · IA 5.9%103rd of 911 in IA
Self-employed workers6.2%
11th
U.S. 10% · IA 10.2%816th of 911 in IA
Per capita income$21,580
4th
WeaknessU.S. $44,673 · IA $40,877900th of 911 in IA
Median gross rent$708
3rd
U.S. $1,413 · IA $972569th of 771 in IA
Bachelor's degree or higher10.9%
3rd
WeaknessU.S. 35.7% · IA 31.4%803rd of 911 in IA
Work from home3.2%
3rd
U.S. 15.1% · IA 11.3%789th of 911 in IA
Broadband access75.5%
2nd
WeaknessU.S. 91% · IA 88.9%851st of 909 in IA
Residents under 1810%
2nd
U.S. 22% · IA 22.9%869th of 911 in IA
Median earnings per worker$29,375
2nd
WeaknessU.S. $49,666 · IA $47,712894th of 910 in IA
Population1,031
1st
U.S. 334,922,499 · IA 3,210,507459th of 911 in IA
Median household income$15,300
1st
WeaknessU.S. $80,734 · IA $75,059896th of 896 in IA
Homeownership rate3.4%
1st
WeaknessU.S. 65.2% · IA 71.7%906th of 909 in IA
Average commute10.8 min
1st
StrengthU.S. 26.4 min · IA 19.8 min899th of 902 in IA
Government workers3.1%
1st
U.S. 14.5% · IA 14.5%877th of 911 in IA

Measure	51101	Woodbury	IA	U.S.	National percentile	Rank in IA
Poverty rateWeakness	48.1%	14%	11.1%	12.5%	99th	4th of 909
Unemployment rateWeakness	14.5%	4.1%	3.6%	5.2%	99th	12th of 911
Income inequality (Gini)Weakness	0.544	0.436	0.444	0.483	97th	20th of 908
Housing vacancy	18.8%	6.2%	8.5%	10.1%	92nd	103rd of 909
Rent-burdened rentersWeakness	59.6%	42.5%	43.9%	51.1%	82nd	95th of 882
Veterans	8.4%	5.7%	6.5%	6.2%	81st	289th of 911
Uninsured rateWeakness	12.1%	7.3%	5%	8.4%	80th	60th of 911
Median age	40.8	36.1	38.6	38.9	63rd	562nd of 911
Diversity index	53.5	50.8	31.4	61.4	58th	23rd of 911
Residents 65 and older	17.2%	15.9%	18.1%	17.2%	55th	638th of 911
Tech workers	2.8%	1.1%	2.9%	3.8%	48th	152nd of 911
Healthcare workers	9.3%	8.8%	9.2%	9.7%	47th	378th of 911
Population density	857/sq mi	122/sq mi	58/sq mi	95/sq mi	41st	64th of 911
Foreign-born residents	6.4%	10.6%	5.9%	14.1%	36th	103rd of 911
Self-employed workers	6.2%	8.5%	10.2%	10%	11th	816th of 911
Per capita incomeWeakness	$21,580	$35,564	$40,877	$44,673	4th	900th of 911
Median gross rent	$708	$981	$972	$1,413	3rd	569th of 771
Bachelor's degree or higherWeakness	10.9%	24.3%	31.4%	35.7%	3rd	803rd of 911
Work from home	3.2%	5.6%	11.3%	15.1%	3rd	789th of 911
Broadband accessWeakness	75.5%	87.3%	88.9%	91%	2nd	851st of 909
Residents under 18	10%	25.8%	22.9%	22%	2nd	869th of 911
Median earnings per workerWeakness	$29,375	$44,867	$47,712	$49,666	2nd	894th of 910
Population	1,031	106,247	3,210,507	334,922,499	1st	459th of 911
Median household incomeWeakness	$15,300	$73,658	$75,059	$80,734	1st	896th of 896
Homeownership rateWeakness	3.4%	68.2%	71.7%	65.2%	1st	906th of 909
Average commuteStrength	10.8 min	18.1 min	19.8 min	26.4 min	1st	899th of 902
Government workers	3.1%	11.6%	14.5%	14.5%	1st	877th 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

10%

5–17

10%

18–24

19%

25–34

19%

35–44

12%

45–54

12%

55–64

65–74

75+

Median age

40.8

Under 18

10%

65 and over

17.2%

Race and ethnicity

White67%
Black6%
Hispanic11%
Asian5%
Native American3%
Pacific Islander4%
Other0%
Multiracial5%

Diversity index

53.5

U.S. 61.4

Foreign-born

6.4%

U.S. 14.1%

Born in state

52.8%

Language spoken at home (households)

English only

84%

Spanish

14%

Other Indo-European

Asian / Pacific

Other

Households

Households: 640
Average household size: 1.3
Family households: 22.3%
Married couples: 5.2%
Living alone: 75.5%
Veterans (of adults): 8.4%
Male / female: 58% / 42%

Income and poverty

Household income distribution

<$25k

61%

$25–50k

17%

$50–75k

$75–100k

10%

$100–150k

$150–200k

$200k+

Median household income

51101

$15,300

Woodbury Co.

$73,658

Iowa

$75,059

United States

$80,734

Per capita income

$21,580

U.S. $44,673

Poverty rate

48.1%

U.S. 12.5%

Households earning $150K+

1.3%

U.S. 23%

Income inequality (Gini)

0.544

U.S. 0.483

Housing

Median home value

51101

—

Woodbury Co.

$183,200

Iowa

$208,000

United States

$332,700

Median gross rent

51101

$708

Woodbury Co.

$981

Iowa

$972

United States

$1,413

Types of housing

Single-family

2–4 units

5–19 units

28%

20+ units

63%

Mobile home

Boat, RV, van

Housing units: 788
Owner-occupied: 3.4%
Vacant: 18.8%
Median year built: 1939 or earlier
Median rooms: 3.5
Renters paying 30%+ of income: 59.6%
Renters paying 50%+ of income: 44.3%
Home value to income: —

Work and commute

How people get to work

Drove alone

67%

Carpooled

Transit

Walked

26%

Bicycle

Worked from home

Other

Commute time (one way)

<10 min

36%

10–19

52%

20–29

30–44

45–59

60+

Average commute

10.8 min

U.S. 26.4 min

Unemployment

14.5%

U.S. 5.2%

In labor force

46.2%

U.S. 63.5%

Jobs and careers

What employed residents do, wherever they work

Occupations

Food service

35%

Management

13%

Office and admin

10%

Healthcare

Production

Construction and repair

Cleaning and personal care

Arts, media and sports

Computer and math

Transportation and moving

Business and finance

Engineering and science

Education

Legal and social services

Police and fire

Sales

Farming, fishing and forestry

Industries

Restaurants and hotels

33%

Health care and social assistance

13%

Manufacturing

12%

Construction

10%

Professional and technical services

10%

Transportation, warehousing and utilities

Arts and recreation

Other services

Finance, insurance and real estate

Admin, support and management

Information

Education

Retail

Public administration

Wholesale

Agriculture and mining

Median earnings per worker

$29,375

U.S. $49,666

Self-employed

6.2%

U.S. 10%

Government workers

3.1%

U.S. 14.5%

Nonprofit workers

9.3%

U.S. 8.8%

Median earnings by type of work

Type of work	51101	U.S.
Management, business, science and arts	$70,417	$74,888
Service	$16,000	$26,804
Sales and office	—	$40,476
Construction and maintenance	—	$49,199
Production and transportation	$46,786	$39,989

Education, internet and health coverage

Highest education (adults 25+)

No diploma

13%

High school

26%

Some college

30%

Associate's

19%

Bachelor's

Graduate

High school graduate or higher: 86.7%
Bachelor's degree or higher: 10.9%
Graduate or professional degree: 5.2%
Households with broadband: 75.5%
Cable, fiber or DSL: 46.9%
No internet access: 9.1%
Without health insurance: 12.1%
Limited-English households: 2.3%

Geography

City (USPS): Sioux City
State: Iowa
County: Woodbury County
Center point: 42.4937° N, 96.3942° W
Land area: 1.2 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 51101

Search by radius

Zip	City	Distance	Population	IncomeMedian income	Home value
51105	Sioux City, IA	1.7 mi	10,415	$51,786	$96,200
51104	Sioux City, IA	2.9 mi	23,197	$75,362	$211,100
51103	Sioux City, IA	3.3 mi	16,895	$58,197	$142,900
68776	South Sioux City, NE	3.5 mi	15,373	$68,750	$179,800
51106	Sioux City, IA	4.6 mi	28,592	$78,434	$200,200
51111	Sioux City, IA	5.2 mi	39	—	—
51108	Sioux City, IA	5.4 mi	5,960	$81,205	$169,700
57049	North Sioux City, SD	6.2 mi	7,962	$93,134	$432,100
68731	Dakota City, NE	7.8 mi	3,469	$79,924	$205,600
51054	Sergeant Bluff, IA	8.4 mi	5,583	$119,716	$301,900
51109	Sioux City, IA	8.9 mi	3,606	$79,034	$130,900
51102	Sioux City, IA · PO box	9.5 mi	—	—	—

Questions about 51101

What city is zip code 51101?

51101 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 51101 in?

51101 is in Woodbury County, Iowa.

What is the population of 51101?

About 1,031 people live in 51101, according to the Census Bureau's American Community Survey.

What time zone is 51101 in?

51101 is in Central Time.

What is the median household income in 51101?

The median household income in 51101 is $15,300.

What zip codes are near 51101?

The closest zip codes to 51101 are 51105, 51104, 51103, 68776, 51106.

Demographic figures are 2020–2024 American Community Survey 5-year estimates for ZIP Code Tabulation Area 51101, from the U.S. Census Bureau. Small areas have wide margins of error. How we build these numbers.