51106 ZIP Code — Sioux City, IA
Woodbury County, Iowa
ZIP code 51106 is located in Sioux City, Iowa, within Woodbury County. It covers approximately 33.49 square miles and serves a population of 27,652 residents. This is a standard ZIP code in the Central (CT) timezone, served by area code 712.
About ZIP code 51106
The housing stock consists of predominantly single-family detached homes. Most homes were built in the pre-1940, giving the area an established character. Median home value is $175,200. Owner-occupancy sits near the national average at 73%.
Median household income is $74,750. 34% of households receive Social Security income, suggesting a notable retiree or disability population.
The dominant occupation class is management, business, and professional, with education and healthcare as the leading industry. The average commute of 16 minutes is near the national average.
Educational attainment is near the national average, with 30% of residents holding a bachelor's degree or higher.
27,652
population
33.49
sq mi land
Standard
ZIP type
Central (CT)
timezone
51106 ZIP code map
Cities in ZIP code 51106
Below are the cities the US Postal Service accepts for ZIP code 51106. Using any city not on this list may result in mail delivery delays.
| City | Status |
|---|---|
| Sioux City | Preferred |
Nearby ZIP codes
51105 Sioux City (4.4 mi)
51101 Sioux City (4.5 mi)
51111 Sioux City (4.6 mi)
51054 Sergeant Bluff (5.7 mi)
51104 Sioux City (6.6 mi)
51108 Sioux City (6.6 mi)
68776 South Sioux City (7.2 mi)
51103 Sioux City (7.4 mi)
51030 Lawton (8.1 mi)
68731 Dakota City (8.1 mi)
51007 Bronson (8.8 mi)
51052 Salix (10 mi)
Demographics
updated 06/2026
| Population | |
|---|---|
| Total population | 27,652 |
| Population density | 826 / sq mi |
| State FIPS | 19 |
| County FIPS | 193 |
| Geography | |
|---|---|
| Land area | 33.49 sq mi |
| Water area | 0.43 sq mi |
| Latitude | 42.4604 |
| Longitude | -96.3226 |
| Timezone | Central (CT) |
| Area code | 712 |
Total population by age
Gender
Race & ethnicity
Economics
updated 06/2026
Household income
| Income range | This ZIP | County avg | State avg |
|---|---|---|---|
| Under $50k | 36.1% | 40.6% | 40.1% |
| $50k – $100k | 36.2% | 33.9% | 33.4% |
| $100k – $200k | 22.4% | 21.3% | 21.5% |
| Over $200k | 5.3% | 4.2% | 5.0% |
Demographics & statistics
27,652
Population
826
People per sq mi
37.5
Median age
$74,750
Median household income
$37,137
Per capita income
$175,200
Median home value
$967
Median monthly rent
72.6%
Home ownership
13.4%
Poverty rate
4.8%
Unemployment
8,523
Housing units
29.6%
Bachelor's or higher
Age distribution
Male
Female
852
Under 5
875
950
5–9
975
711
10–14
729
1,137
15–19
1,167
1,169
20–24
1,201
1,570
25–34
1,611
1,529
35–44
1,569
1,699
45–54
1,745
920
55–59
945
748
60–64
768
1,271
65–74
1,304
822
75–84
844
267
85+
274
← Male
Female →
Age summary
| Group | Count | % |
|---|---|---|
| Under 18 | 6,053 | 21.9% |
| 18 and over | 21,599 | 78.1% |
| 65 and over | 4,782 | 17.3% |
| Median age | 37.5 years | |
Race & ethnicity
White
81.1%
Two or more races
5.4%
Black or African American
4.7%
Hispanic or Latino
4.6%
Other race
2%
Asian
1.1%
American Indian / Alaska Native
0.5%
Native Hawaiian / Pacific Islander
0.5%
| Group | Count | % |
|---|---|---|
| White | 23,517 | 81.1% |
| Two or more races | 1,578 | 5.4% |
| Black or African American | 1,374 | 4.7% |
| Hispanic or Latino | 1,344 | 4.6% |
| Other race | 589 | 2% |
| Asian | 310 | 1.1% |
| American Indian / Alaska Native | 147 | 0.5% |
| Native Hawaiian / Pacific Islander | 137 | 0.5% |
Household income
| Income range | This ZIP | County avg | State avg |
|---|---|---|---|
| Under $50k | 36.1% | 40.6% | 40.1% |
| $50k – $100k | 36.2% | 33.9% | 33.4% |
| $100k – $200k | 22.4% | 21.3% | 21.5% |
| Over $200k | 5.3% | 4.2% | 5.0% |
Under $10k
4.2%
$10k–$15k
3.9%
$15k–$25k
8.7%
$25k–$35k
8.4%
$35k–$50k
9.5%
$50k–$75k
15.4%
$75k–$100k
11.2%
$100k–$150k
23.1%
$150k–$200k
8.4%
$200k+
7.1%
| Range | % of households |
|---|---|
| Under $10k | 4.2% |
| $10k–$15k | 3.9% |
| $15k–$25k | 8.7% |
| $25k–$35k | 8.4% |
| $35k–$50k | 9.5% |
| $50k–$75k | 15.4% |
| $75k–$100k | 11.2% |
| $100k–$150k | 23.1% |
| $150k–$200k | 8.4% |
| $200k+ | 7.1% |
| Median income | $74,750 |
Housing
Home values
Under $50k
2.5%
$50k–$100k
9.5%
$100k–$150k
23.2%
$150k–$200k
28.2%
$200k–$300k
24.0%
$300k–$500k
7.7%
$500k–$1M
5.0%
Housing overview
| Metric | Value |
|---|---|
| Median home value | $175,200 |
| Median rent / month | $967 |
| Owner occupied | 72.6% |
| Renter occupied | 27.4% |
| Vacant | 4.7% |
| Single-family detached | 75.6% |
| Large apartment buildings | 6.3% |
| Mobile homes | 3.3% |
| Median rooms | 6.1 |
| Avg household size (owned) | 2.47 |
Year built
| Era | % |
|---|---|
| 2020 or later | 0.5% |
| 2010–2019 | 5.9% |
| 2000–2009 | 4.7% |
| 1990–1999 | 7.3% |
| 1980–1989 | 6.2% |
| 1970–1979 | 16.1% |
| 1960–1969 | 12.2% |
| 1950–1959 | 15.9% |
| 1940–1949 | 9.6% |
| 1939 or earlier | 21.5% |
Bedrooms
| Size | % of units |
|---|---|
| No bedroom (studio) | 0.8% |
| 1 bedroom | 6.8% |
| 2 bedrooms | 30.3% |
| 3 bedrooms | 41.0% |
| 4 bedrooms | 14.1% |
| 5+ bedrooms | 6.9% |
Vehicles per household
| Vehicles | % of households |
|---|---|
| No vehicle | 4.1% |
| 1 vehicle | 33.5% |
| 2 vehicles | 38.7% |
| 3 or more | 23.7% |
Heating fuel
| Fuel type | % |
|---|---|
| Utility gas | 67.5% |
| Electricity | 29.1% |
| Propane / LP gas | 2.8% |
| Fuel oil | 0.3% |
| No fuel used | 0.1% |
Households & families
| Household type | Count | % |
|---|---|---|
| Married-couple family | 5,215 | 47.5% |
| Cohabiting couple | 772 | 7.0% |
| Male householder, no spouse | 1,962 | 17.9% |
| Female householder, no spouse | 3,041 | 27.7% |
| Households with children under 18 | 3,167 | 28.8% |
| Households with seniors (65+) | 3,757 | 34.2% |
| Average household size | 2.39 | |
Marital status
| Status | Male | Female |
|---|---|---|
| Never married | 39.4% | 31.7% |
| Married | 49.7% | 48.0% |
| Separated | 1.5% | 0.6% |
| Widowed | 2.2% | 9.6% |
| Divorced | 7.2% | 10.1% |
Education
Less than 9th grade
2.4%
Some HS, no diploma
4.0%
HS graduate
32.6%
Some college, no degree
18.2%
Associate's degree
13.1%
Bachelor's degree
16.6%
Graduate / professional
12.9%
| Metric | % |
|---|---|
| HS diploma or higher | 93.5% |
| Bachelor's or higher | 29.6% |
School enrollment (ages 3–17)
| Type | Count | % |
|---|---|---|
| Nursery / preschool | 354 | 4.6% |
| Kindergarten | 447 | 5.8% |
| Elementary school | 2,510 | 32.8% |
| High school | 1,303 | 17.0% |
| College / grad school | 3,045 | 39.8% |
Employment
Industry of employment
Education & healthcare
25.4%
Manufacturing
15.9%
Retail trade
15.2%
Arts, food & hospitality
8.2%
Public administration
5.8%
Finance & real estate
5.4%
Construction
5.3%
Other services
5.3%
Professional & management
5.2%
Transportation & utilities
4.3%
Wholesale trade
2.5%
Information
1.2%
Agriculture & mining
0.3%
Occupation
| Category | % |
|---|---|
| Management, business & arts | 34.3% |
| Service | 16.2% |
| Sales & office | 21.5% |
| Natural resources & construction | 7.0% |
| Production & transportation | 21.0% |
Employment type
| Type | % |
|---|---|
| Private sector | 83.6% |
| Government | 13.1% |
| Self-employed | 3.3% |
| Unpaid family workers | 0.0% |
Commute
| Method | % |
|---|---|
| Drive alone | 86.8% |
| Carpool | 6.0% |
| Public transit | 0.4% |
| Walk | 2.3% |
| Work from home | 4.4% |
| Other means | 0.2% |
| Avg commute (minutes) | 15.9 |
Poverty
All people
13.4%
Under 18 years
19.2%
18 and over
11.8%
Married-couple families
2.8%
Female-led households
26.0%
Income support
| Source | % of households |
|---|---|
| Social Security | 34.3% |
| Retirement income | 19.9% |
| Supplemental Security | 2.5% |
| Cash public assistance | 2.6% |
| Food stamps / SNAP | 8.3% |
Health indicators
| Condition | % |
|---|---|
| Obesity | 35.5% |
| High blood pressure | 29.7% |
| High cholesterol | 31.1% |
| Diabetes | 9.6% |
| Heart disease | 5.7% |
| Stroke | 2.6% |
| Asthma | 9.2% |
| Arthritis | 21.9% |
| Kidney disease | 2.6% |
| Pulmonary disease | 5.9% |
| Cancer | 6.3% |
| Behavior / access | % |
|---|---|
| Smoking | 16.1% |
| Binge drinking | 21.8% |
| No physical activity | 24.3% |
| Less than 7 hrs sleep | 31.5% |
| Depression | 17.8% |
| Fair or poor health | 11.6% |
| Poor mental health | 14.1% |
| Poor physical health | 8.8% |
| No health insurance | 9.9% |
| Visited doctor (checkup) | 76.2% |
| Visited dentist | 70.1% |
| Cholesterol screening | 86.5% |
| Teeth loss | 12.3% |
Veterans & disability
| Veterans | Count | % |
|---|---|---|
| Civilian veterans | 1,647 | 7.6% |
| Disability | % |
|---|---|
| Any disability | 12.7% |
| Under 18 | 5.8% |
| 18–64 years | 8.6% |
| 65 and over | 36.4% |
Health insurance coverage
| Type | % |
|---|---|
| Private insurance | 71.8% |
| Public insurance | 36.8% |
| No insurance | 3.7% |
| Uninsured under 19 | 2.0% |
Language & origin
Language spoken at home (age 5+)
| Language | Count | % |
|---|---|---|
| English only | 25,925 | 93.8% |
| Spanish | 1,223 | 4.7% |
| Other Indo-European | 758 | 2.9% |
| Asian & Pacific Islander | 211 | 0.8% |
| Other languages | 226 | 0.9% |
Place of birth & citizenship
| Origin | Count | % |
|---|---|---|
| Native born (US) | 26,184 | 94.7% |
| Born in same state | 26,007 | 94.1% |
| Born in different state | 18,959 | 68.6% |
| Foreign born | 177 | 0.6% |
| Naturalized citizen | 1,468 | 5.3% |
| Not a US citizen | 655 | 44.6% |
Ancestry
| Ancestry | Count | % |
|---|---|---|
| Italian | 3,677 | 13.3% |
| French | 2,497 | 9% |
| Polish | 1,558 | 5.6% |
| Arab | 1,388 | 5% |
| Ancestry | Count | % |
|---|---|---|
| English | 875 | 3.2% |
| Dutch | 534 | 1.9% |
| German | 169 | 0.6% |
| Norwegian | 48 | 0.2% |
Technology access
| Metric | % of households |
|---|---|
| Computer access | 39.7% |
| Internet access | 92.1% |
Source: U.S. Census Bureau, American Community Survey 2025 estimates.
Frequently asked questions about ZIP code 51106
What city is ZIP code 51106 in?
ZIP code 51106 is primarily assigned to Sioux City, Iowa.
What county is ZIP code 51106 in?
ZIP code 51106 falls within Woodbury County, Iowa.
What is the typical home value in ZIP code 51106?
The median home value in ZIP code 51106 is $175,200.
What is the population of ZIP code 51106?
ZIP code 51106 has an estimated population of 27,652 residents, with a density of 826 people per square mile.
What is the median household income in ZIP code 51106?
The median household income in ZIP code 51106 is $74,750, below the national median of ~$75,000.
What timezone is ZIP code 51106 in?
ZIP code 51106 observes the CST timezone.