51108 ZIP Code — Sioux City, IA

Woodbury County, Iowa

ZIP code 51108 is located in Sioux City, Iowa, within Woodbury County. It covers approximately 46.00 square miles and serves a population of 5,555 residents. This is a standard ZIP code in the Central (CT) timezone, served by area code 712.

About ZIP code 51108

The housing stock consists of predominantly single-family detached homes. Most homes were built in the 1950s, giving the area an established character. Median home value is $152,700. Owner-occupancy is high at 89%, well above the national average.

The gap between median ($71,176) and mean household income suggests income inequality — a small number of higher earners pull the average up. The poverty rate of 3% is below the national average.

The dominant occupation class is management, business, and professional, with education and healthcare as the leading industry. The average commute of 23 minutes is near the national average.

Educational attainment is near the national average, with 28% of residents holding a bachelor's degree or higher.

5,555

population

46.00

sq mi land

Standard

ZIP type

Central (CT)

timezone

51108 ZIP code map

Cities in ZIP code 51108

Below are the cities the US Postal Service accepts for ZIP code 51108. Using any city not on this list may result in mail delivery delays.

City	Status
Sioux City	Acceptable
Sioux City	Preferred

Nearby ZIP codes

51105 Sioux City (3.2 mi) 51104 Sioux City (3.2 mi) 51101 Sioux City (5.2 mi) 51103 Sioux City (5.5 mi) 51024 Hinton (5.8 mi) 51106 Sioux City (6.6 mi) 51109 Sioux City (6.9 mi) 68776 South Sioux City (8 mi) 57049 North Sioux City (8.5 mi) 51030 Lawton (9.4 mi) 51111 Sioux City (10 mi) 51038 Merrill (11.1 mi)

Demographics updated 05/2026

Population
Total population	5,555
Population density	121 / sq mi
State FIPS	19
County FIPS	193

Geography
Land area	46.00 sq mi
Water area	0.12 sq mi
Latitude	42.5549
Longitude	-96.3447
Timezone	Central (CT)
Area code	712

Total population by age

Gender

Race & ethnicity

Economics updated 05/2026

Household income

Income range	This ZIP	County avg	State avg
Under $50k	36.5%	40.6%	40.1%
$50k – $100k	37.4%	33.9%	33.4%
$100k – $200k	20.1%	21.3%	21.5%
Over $200k	6.1%	4.2%	5.0%

Demographics & statistics

5,555

Population

121

People per sq mi

38.8

Median age

$71,176

Median household income

$38,486

Per capita income

$152,700

Median home value

$1,049

Median monthly rent

88.9%

Home ownership

2.7%

Poverty rate

5.6%

Unemployment

1,844

Housing units

27.6%

Bachelor's or higher

Age distribution

Male Female

172

Under 5

156

298

5–9

271

242

10–14

221

216

15–19

196

148

20–24

135

205

25–34

186

341

35–44

310

406

45–54

369

242

55–59

220

221

60–64

201

243

65–74

221

123

75–84

112

85+

← Male

Female →

Age summary

Group	Count	%
Under 18	1,656	29.8%
18 and over	3,899	70.2%
65 and over	799	14.4%
Median age	38.8 years

Race & ethnicity

White 67.4%

Hispanic or Latino 15.6%

Two or more races 10.6%

Other race 5.4%

Asian 0.6%

Black or African American 0.3%

American Indian / Alaska Native 0.1%

Group	Count	%
White	4,438	67.4%
Hispanic or Latino	1,027	15.6%
Two or more races	696	10.6%
Other race	355	5.4%
Asian	41	0.6%
Black or African American	17	0.3%
American Indian / Alaska Native	8	0.1%

Household income

Income range	This ZIP	County avg	State avg
Under $50k	36.5%	40.6%	40.1%
$50k – $100k	37.4%	33.9%	33.4%
$100k – $200k	20.1%	21.3%	21.5%
Over $200k	6.1%	4.2%	5.0%

Under $10k 2.5%

$10k–$15k 2.5%

$15k–$25k 8.1%

$25k–$35k 13.8%

$35k–$50k 3.4%

$50k–$75k 20.6%

$75k–$100k 12.6%

$100k–$150k 19.5%

$150k–$200k 7.1%

$200k+ 9.9%

Range	% of households
Under $10k	2.5%
$10k–$15k	2.5%
$15k–$25k	8.1%
$25k–$35k	13.8%
$35k–$50k	3.4%
$50k–$75k	20.6%
$75k–$100k	12.6%
$100k–$150k	19.5%
$150k–$200k	7.1%
$200k+	9.9%
Median income	$71,176

Housing

Home values

Under $50k 3.8%

$50k–$100k 14.6%

$100k–$150k 30.2%

$150k–$200k 20.6%

$200k–$300k 16.1%

$300k–$500k 9.2%

$500k–$1M 5.6%

Housing overview

Metric	Value
Median home value	$152,700
Median rent / month	$1,049
Owner occupied	88.9%
Renter occupied	11.1%
Vacant	0.0%
Single-family detached	89.3%
Large apartment buildings	1.5%
Mobile homes	4.9%
Median rooms	6.1
Avg household size (owned)	2.66

Year built

Era	%
2020 or later	0.2%
2010–2019	1.6%
2000–2009	13.8%
1990–1999	6.2%
1980–1989	8.7%
1970–1979	8.6%
1960–1969	10.2%
1950–1959	24.1%
1940–1949	5.3%
1939 or earlier	21.2%

Bedrooms

Size	% of units
No bedroom (studio)	0.0%
1 bedroom	2.0%
2 bedrooms	26.3%
3 bedrooms	43.7%
4 bedrooms	18.7%
5+ bedrooms	9.3%

Vehicles per household

Vehicles	% of households
No vehicle	3.3%
1 vehicle	29.3%
2 vehicles	38.1%
3 or more	29.3%

Heating fuel

Fuel type	%
Utility gas	51.8%
Electricity	37.8%
Propane / LP gas	9.7%
Fuel oil	0.6%

Households & families

Household type	Count	%
Married-couple family	1,301	62.7%
Cohabiting couple	141	6.8%
Male householder, no spouse	340	16.4%
Female householder, no spouse	292	14.1%
Households with children under 18	693	33.4%
Households with seniors (65+)	593	28.6%
Average household size	2.68

Marital status

Status	Male	Female
Never married	16.9%	29.0%
Married	66.8%	60.9%
Separated	0.6%	0.0%
Widowed	3.1%	4.2%
Divorced	12.7%	5.9%

Education

Less than 9th grade 1.6%

Some HS, no diploma 3.3%

HS graduate 32.1%

Some college, no degree 20.8%

Associate's degree 14.6%

Bachelor's degree 21.4%

Graduate / professional 6.2%

Metric	%
HS diploma or higher	95.1%
Bachelor's or higher	27.6%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	281	14.5%
Kindergarten	90	4.6%
Elementary school	763	39.2%
High school	510	26.2%
College / grad school	300	15.4%

Employment

Industry of employment

Education & healthcare 20.3%

Arts, food & hospitality 15.1%

Manufacturing 11.7%

Finance & real estate 11.6%

Construction 11.2%

Retail trade 9.3%

Other services 8.5%

Public administration 4.1%

Professional & management 2.6%

Wholesale trade 2.2%

Transportation & utilities 1.8%

Agriculture & mining 1.5%

Occupation

Category	%
Management, business & arts	36.7%
Service	14.6%
Sales & office	21.0%
Natural resources & construction	18.0%
Production & transportation	9.7%

Employment type

Type	%
Private sector	87.1%
Government	9.6%
Self-employed	3.3%
Unpaid family workers	0.0%

Commute

Method	%
Drive alone	84.3%
Carpool	11.1%
Public transit	0.0%
Walk	0.0%
Work from home	3.9%
Other means	0.7%
Avg commute (minutes)	22.7

Poverty

All people 2.7%

Under 18 years 0.0%

18 and over 3.9%

Married-couple families 1.4%

Female-led households 22.6%

Income support

Source	% of households
Social Security	29.6%
Retirement income	21.8%
Supplemental Security	1.3%
Cash public assistance	0.4%
Food stamps / SNAP	3.0%

Health indicators

Condition	%
Obesity	36.7%
High blood pressure	32.6%
High cholesterol	33.5%
Diabetes	10.5%
Heart disease	6.2%
Stroke	2.9%
Asthma	9.2%
Arthritis	23.8%
Kidney disease	2.7%
Pulmonary disease	6.6%
Cancer	6.7%

Behavior / access	%
Smoking	17.4%
Binge drinking	21.0%
No physical activity	25.0%
Less than 7 hrs sleep	31.3%
Depression	17.5%
Fair or poor health	12.5%
Poor mental health	13.5%
Poor physical health	9.6%
No health insurance	9.6%
Visited doctor (checkup)	76.5%
Visited dentist	69.6%
Cholesterol screening	88.8%
Teeth loss	12.6%

Veterans & disability

Veterans	Count	%
Civilian veterans	249	6.4%

Disability	%
Any disability	12.0%
Under 18	0.2%
18–64 years	11.1%
65 and over	40.1%

Health insurance coverage

Type	%
Private insurance	76.8%
Public insurance	45.5%
No insurance	7.9%
Uninsured under 19	5.3%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	5,227	94.1%
Spanish	177	3.4%
Other Indo-European	177	3.4%
Asian & Pacific Islander	0	0.0%
Other languages	0	0.0%

Place of birth & citizenship

Origin	Count	%
Native born (US)	5,074	91.3%
Born in same state	5,063	91.1%
Born in different state	4,218	75.9%
Foreign born	11	0.2%
Naturalized citizen	481	8.7%
Not a US citizen	146	30.4%

Ancestry

Ancestry	Count	%
Italian	776	14%
French	540	9.7%
English	272	4.9%
Arab	256	4.6%

Ancestry	Count	%
Polish	222	4%
Dutch	86	1.5%
German	5	0.1%

Technology access

Metric	% of households
Computer access	37.3%
Internet access	94.9%

Source: U.S. Census Bureau, American Community Survey 2025 estimates.

Frequently asked questions about ZIP code 51108

What city is ZIP code 51108 in?

ZIP code 51108 is primarily assigned to Sioux City, Iowa.

What county is ZIP code 51108 in?

ZIP code 51108 falls within Woodbury County, Iowa.

Is ZIP code 51108 mostly owner-occupied?

89% of occupied units in ZIP code 51108 are owner-occupied, well above the national average.

What is the typical home value in ZIP code 51108?

The median home value in ZIP code 51108 is $152,700.

What is the population of ZIP code 51108?

ZIP code 51108 has an estimated population of 5,555 residents, with a density of 121 people per square mile.

What is the median household income in ZIP code 51108?

The median household income in ZIP code 51108 is $71,176, below the national median of ~$75,000.

What timezone is ZIP code 51108 in?

ZIP code 51108 observes the CST timezone.