Zip code 51108: Sioux City, Iowa

Q: What city is zip code 51108?

51108 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 51108 in?

51108 is mostly in Plymouth County, but it extends into 1 other county.

Q: What is the population of 51108?

About 5,960 people live in 51108, according to the Census Bureau's American Community Survey.

Q: What is the median household income in 51108?

The median household income in 51108 is $81,205.

Q: What zip codes are near 51108?

The closest zip codes to 51108 are 51104, 51105, 51101, 51103, 51024.

Residential delivery areaPlymouth CountyCentral Time

Population

5,960

Median household income

$81K

U.S. $81K

Median home value

$170K

U.S. $333K

Median rent

$1,350/mo

U.S. $1,413

Median age

37.6

U.S. 38.9

Land area

46 sq mi

130 people/sq mi

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

About 51108

51108 is a small-town zip code in Sioux City, Iowa (Plymouth County), covering 46 sq mi of land. About 5,960 people live here, or 130 per square mile. The median resident is 37.6 years old, compared with 38.9 nationally.

The median household earns $81,205 a year, close to the national median of $80,734. 6.5% of residents live below the poverty line (U.S.: 12.5%). A typical home is valued at $169,700, or 2.1 years of median household income (U.S.: 4.1 years), which makes homes relatively affordable for local earners. 83% of occupied homes are lived in by their owners, and renters pay a median of $1,350 a month.

29% of adults hold a bachelor's degree or higher (U.S.: 36%). Commuters average 18.4 minutes each way, and 5% of workers work from home. The most common jobs among working residents are in sales, management and healthcare.

How 51108 compares

Sorted from highest to lowest national percentile

Residents under 1832.3%
98th
U.S. 22% · IA 22.9%63rd of 911 in IA
Homeownership rate83.3%
86th
StrengthU.S. 65.2% · IA 71.7%401st of 909 in IA
Rent-burdened renters60.8%
85th
WeaknessU.S. 51.1% · IA 43.9%88th of 882 in IA
Healthcare workers12.3%
83rd
U.S. 9.7% · IA 9.2%174th of 911 in IA
Income inequality (Gini)0.478
80th
WeaknessU.S. 0.483 · IA 0.44490th of 908 in IA
Unemployment rate5.6%
62nd
U.S. 5.2% · IA 3.6%133rd of 911 in IA
Self-employed workers10.1%
60th
U.S. 10% · IA 10.2%623rd of 911 in IA
Median earnings per worker$49,699
55th
U.S. $49,666 · IA $47,712339th of 910 in IA
Median household income$81,205
52nd
U.S. $80,734 · IA $75,059323rd of 896 in IA
Residents 65 and older16.8%
52nd
U.S. 17.2% · IA 18.1%659th of 911 in IA
Median gross rent$1,350
47th
U.S. $1,413 · IA $97222nd of 771 in IA
Per capita income$38,642
46th
U.S. $44,673 · IA $40,877438th of 911 in IA
Bachelor's degree or higher28.7%
43rd
U.S. 35.7% · IA 31.4%198th of 911 in IA
Veterans5.1%
40th
U.S. 6.2% · IA 6.5%679th of 911 in IA
Median age37.6
39th
U.S. 38.9 · IA 38.6709th of 911 in IA
Foreign-born residents6.2%
35th
U.S. 14.1% · IA 5.9%106th of 911 in IA
Diversity index38.9
34th
U.S. 61.4 · IA 31.468th of 911 in IA
Government workers11.6%
32nd
U.S. 14.5% · IA 14.5%568th of 911 in IA
Poverty rate6.5%
22nd
U.S. 12.5% · IA 11.1%590th of 909 in IA
Population density130/sq mi
16th
U.S. 95/sq mi · IA 58/sq mi156th of 911 in IA
Median home value$169,700
14th
U.S. $332,700 · IA $208,000390th of 881 in IA
Broadband access85.1%
12th
WeaknessU.S. 91% · IA 88.9%651st of 909 in IA
Population5,960
10th
U.S. 334,922,499 · IA 3,210,507127th of 911 in IA
Average commute18.4 min
7th
StrengthU.S. 26.4 min · IA 19.8 min725th of 902 in IA
Work from home4.9%
7th
U.S. 15.1% · IA 11.3%709th of 911 in IA
Uninsured rate1.8%
4th
StrengthU.S. 8.4% · IA 5%713th of 911 in IA
Tech workers0.3%
4th
U.S. 3.8% · IA 2.9%584th of 911 in IA
Housing vacancy0%
1st
U.S. 10.1% · IA 8.5%909th of 909 in IA

Measure	51108	Plymouth	IA	U.S.	National percentile	Rank in IA
Residents under 18	32.3%	25%	22.9%	22%	98th	63rd of 911
Homeownership rateStrength	83.3%	73.6%	71.7%	65.2%	86th	401st of 909
Rent-burdened rentersWeakness	60.8%	30.6%	43.9%	51.1%	85th	88th of 882
Healthcare workers	12.3%	9.5%	9.2%	9.7%	83rd	174th of 911
Income inequality (Gini)Weakness	0.478	0.407	0.444	0.483	80th	90th of 908
Unemployment rate	5.6%	2.2%	3.6%	5.2%	62nd	133rd of 911
Self-employed workers	10.1%	13.2%	10.2%	10%	60th	623rd of 911
Median earnings per worker	$49,699	$49,734	$47,712	$49,666	55th	339th of 910
Median household income	$81,205	$83,251	$75,059	$80,734	52nd	323rd of 896
Residents 65 and older	16.8%	19.8%	18.1%	17.2%	52nd	659th of 911
Median gross rent	$1,350	$910	$972	$1,413	47th	22nd of 771
Per capita income	$38,642	$41,532	$40,877	$44,673	46th	438th of 911
Bachelor's degree or higher	28.7%	21.7%	31.4%	35.7%	43rd	198th of 911
Veterans	5.1%	6.9%	6.5%	6.2%	40th	679th of 911
Median age	37.6	41.3	38.6	38.9	39th	709th of 911
Foreign-born residents	6.2%	3.7%	5.9%	14.1%	35th	106th of 911
Diversity index	38.9	22	31.4	61.4	34th	68th of 911
Government workers	11.6%	11.9%	14.5%	14.5%	32nd	568th of 911
Poverty rate	6.5%	6.9%	11.1%	12.5%	22nd	590th of 909
Population density	130/sq mi	30/sq mi	58/sq mi	95/sq mi	16th	156th of 911
Median home value	$169,700	$228,900	$208,000	$332,700	14th	390th of 881
Broadband accessWeakness	85.1%	89.8%	88.9%	91%	12th	651st of 909
Population	5,960	25,747	3,210,507	334,922,499	10th	127th of 911
Average commuteStrength	18.4 min	19.2 min	19.8 min	26.4 min	7th	725th of 902
Work from home	4.9%	9.2%	11.3%	15.1%	7th	709th of 911
Uninsured rateStrength	1.8%	5.3%	5%	8.4%	4th	713th of 911
Tech workers	0.3%	1.2%	2.9%	3.8%	4th	584th of 911
Housing vacancy	0%	5.3%	8.5%	10.1%	1st	909th of 909

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

25%

5–17

18–24

10%

25–34

10%

35–44

13%

45–54

12%

55–64

65–74

75+

Median age

37.6

Under 18

32.3%

65 and over

16.8%

Race and ethnicity

White76%
Black2%
Hispanic19%
Asian1%
Native American0%
Pacific Islander0%
Other0.6%
Multiracial2%

Diversity index

38.9

U.S. 61.4

Foreign-born

6.2%

U.S. 14.1%

Born in state

77.3%

Language spoken at home (households)

English only

92%

Spanish

Other Indo-European

0.8%

Asian / Pacific

Other

0.5%

Households

Households: 2,160
Average household size: 2.8
Family households: 73.1%
Married couples: 59.4%
Living alone: 24.3%
Veterans (of adults): 5.1%
Male / female: 54% / 46%

Income and poverty

Household income distribution

<$25k

17%

$25–50k

16%

$50–75k

14%

$75–100k

14%

$100–150k

26%

$150–200k

$200k+

10%

Median household income

51108

$81,205

Plymouth Co.

$83,251

Iowa

$75,059

United States

$80,734

Per capita income

$38,642

U.S. $44,673

Poverty rate

6.5%

U.S. 12.5%

Households earning $150K+

13.1%

U.S. 23%

Income inequality (Gini)

0.478

U.S. 0.483

Housing

Median home value

51108

$169,700

Plymouth Co.

$228,900

Iowa

$208,000

United States

$332,700

Median gross rent

51108

$1,350

Plymouth Co.

$910

Iowa

$972

United States

$1,413

Types of housing

Single-family

83%

2–4 units

5–19 units

20+ units

Mobile home

10%

Boat, RV, van

Housing units: 2,160
Owner-occupied: 83.3%
Vacant: 0%
Median year built: 1971
Median rooms: 6
Renters paying 30%+ of income: 60.8%
Renters paying 50%+ of income: 39.5%
Home value to income: 2.1× (U.S. 4.1×)

Work and commute

How people get to work

Drove alone

80%

Carpooled

14%

Transit

Walked

Bicycle

Worked from home

Other

Commute time (one way)

<10 min

14%

10–19

39%

20–29

36%

30–44

45–59

60+

Average commute

18.4 min

U.S. 26.4 min

Unemployment

5.6%

U.S. 5.2%

In labor force

63.2%

U.S. 63.5%

Jobs and careers

What employed residents do, wherever they work

Occupations

Sales

15%

Management

12%

Healthcare

12%

Food service

11%

Office and admin

11%

Production

Transportation and moving

Construction and repair

Business and finance

Education

Cleaning and personal care

Arts, media and sports

Legal and social services

Police and fire

0.5%

Computer and math

0.3%

Engineering and science

0.1%

Farming, fishing and forestry

Industries

Health care and social assistance

17%

Restaurants and hotels

16%

Retail

15%

Manufacturing

15%

Transportation, warehousing and utilities

Construction

Finance, insurance and real estate

Education

Public administration

Admin, support and management

Other services

Professional and technical services

Agriculture and mining

Arts and recreation

Wholesale

0.8%

Information

Median earnings per worker

$49,699

U.S. $49,666

Self-employed

10.1%

U.S. 10%

Government workers

11.6%

U.S. 14.5%

Nonprofit workers

6.1%

U.S. 8.8%

Median earnings by type of work

Type of work	51108	U.S.
Management, business, science and arts	$72,917	$74,888
Service	$9,554	$26,804
Sales and office	$37,794	$40,476
Construction and maintenance	$62,262	$49,199
Production and transportation	$52,039	$39,989

Education, internet and health coverage

Highest education (adults 25+)

No diploma

High school

32%

Some college

19%

Associate's

14%

Bachelor's

20%

Graduate

High school graduate or higher: 93.7%
Bachelor's degree or higher: 28.7%
Graduate or professional degree: 9.1%
Households with broadband: 85.1%
Cable, fiber or DSL: 67%
No internet access: 11.1%
Without health insurance: 1.8%
Limited-English households: 4.2%

Geography

City (USPS): Sioux City
State: Iowa
County: Plymouth County
Center point: 42.5660° N, 96.3525° W
Land area: 46 sq mi
Water area: 0.1 sq mi
Time zone: Central Time (UTC-6, UTC-5 in summer)
Zip type: Residential delivery area

51108 spans 2 counties

Plymouth County53% of land
Woodbury County47% of land

Cities and towns within this zip

Sioux City18% of zip

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

Zip codes near 51108

Search by radius

Zip	City	Distance	Population	IncomeMedian income	Home value
51104	Sioux City, IA	3.4 mi	23,197	$75,362	$211,100
51105	Sioux City, IA	4.1 mi	10,415	$51,786	$96,200
51101	Sioux City, IA	5.4 mi	1,031	$15,300	—
51103	Sioux City, IA	5.9 mi	16,895	$58,197	$142,900
51024	Hinton, IA	6.2 mi	2,081	$114,219	$347,800
51109	Sioux City, IA	6.7 mi	3,606	$79,034	$130,900
51106	Sioux City, IA	7.4 mi	28,592	$78,434	$200,200
57049	North Sioux City, SD	8.5 mi	7,962	$93,134	$432,100
68776	South Sioux City, NE	8.8 mi	15,373	$68,750	$179,800
51030	Lawton, IA	9.6 mi	1,468	$86,167	$271,000
51038	Merrill, IA	9.7 mi	1,449	$95,893	$183,100
51111	Sioux City, IA	10 mi	39	—	—

Zip codes like 51108 elsewhere

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

Questions about 51108

What city is zip code 51108?

51108 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 51108 in?

51108 is mostly in Plymouth County, but it extends into 1 other county.

What is the population of 51108?

About 5,960 people live in 51108, according to the Census Bureau's American Community Survey.

What time zone is 51108 in?

51108 is in Central Time.

What is the median household income in 51108?

The median household income in 51108 is $81,205.

What zip codes are near 51108?

The closest zip codes to 51108 are 51104, 51105, 51101, 51103, 51024.

Demographic figures are 2020–2024 American Community Survey 5-year estimates for ZIP Code Tabulation Area 51108, from the U.S. Census Bureau. Small areas have wide margins of error. How we build these numbers.