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Population & Demographics

ZIP Code 51104 has 23,080 residents and 8,533 households (average 2.62 persons per household). The median age is 35.2 years, younger than the state (38.6) and younger than the nation (38.8). The gender split is 49.0% male and 51.0% female, which is about the same as the state male share (49.7%), making this a female-majority area. Largest groups are White (68.0%, much lower than the state average of 84.5%) and Hispanic or Latino (19.4%); Hispanic or Latino residents make up 19.4%, which is much higher than the state average (6.8%).

Explore More:Population Over Time By Age & Gender By Race By Gender Nativity & Citizenship

Source: U.S. Census 2020 Demographics & Housing Characteristics (DHC) and U.S. Census 2011-2023 American Community Survey (ACS) 5-Year Estimates.

2020 Population:	23,080Source: Census DHC
2023 ACS Population Estimate:	22,792Source: Census ACS
2025 ZC Population Estimate:	23,527Source: ZIP-Codes.com
Population Density:	3,087.6 people per sq mile
Average Income:	$74,984Source: Census ACS

Households:	8,533Source: Census DHC
Average House Value:	$193,000Source: Census ACS
Persons Per Household:	2.62Source: Census DHC
Average Family Size:	3.12Source: Census ACS

Population Over Time (with 2010 & 2020 Census Benchmarks)

Line chart of ZIP 51104 population estimates from 2011-2023, with markers for the 2010 and 2020 Decennial Census counts to show growth or decline over time. Chart loads automatically and replaces this content. Load Chart Manually (if needed)

Group	2010	2011	2102	2013	2014	2015	2016	2017	2018	2019	2020	2021	2022	2023
Census ACS Population Estimate	--	22,112	21,878	22,509	23,222	22,801	22,223	22,549	22,924	22,981	22,066	23,038	22,759	22,792
Decennial Census	22,104	--	--	--	--	--	--	--	--	--	23,080	--	--	--

Source: U.S. Census 2011-2023 American Community Survey 5-Year Estimates. DP05. DEMOGRAPHIC AND HOUSING ESTIMATES

Population by Age & Gender (Total, Male, Female)

Median Age: 35.2

Male Median Age: 33.6

Female Median Age: 36.7

Line chart for ZIP 51104 showing total, male, and female population by age group. Chart loads automatically and replaces this content. Load Chart Manually (if needed)

Group	< 5	5-9	10-14	15-19	20-24	25-29	30-34	35-39	40-44	45-49	50-54	55-59	60-64	65-69	70-74	75-79	80-84	85+
Male	826	879	849	899	863	736	780	776	647	675	648	624	587	577	371	245	168	159
Female	769	861	839	867	799	760	750	720	700	664	663	683	664	648	458	310	276	340
Total	1,595	1,740	1,688	1,766	1,662	1,496	1,530	1,496	1,347	1,339	1,311	1,307	1,251	1,225	829	555	444	499

Source: U.S. Census Bureau (2020) Demographics & Housing Characteristics (DHC)

Pie Chart & Table Comparison Chart

Population by Race

Pie chart of the racial and ethnic makeup of ZIP 51104. Table below includes counts and percentages. Chart loads automatically and replaces this content. Load Chart Manually (if needed)

White:	15,702	61.94%
Black:	1,648	6.50%
Hispanic:*	4,469	17.63%
Asian:	960	3.79%
American Indian:	519	2.05%
Hawaiian:	111	0.44%
Other:	1,940	7.65%
Total:	25,349	100%

Source: U.S. Census Bureau (2020) Demographics & Housing Characteristics (DHC)

* NOTE: Hispanic or Latino is an ethnicity, not a race. This means individuals who identify as Hispanic will also be included in one of the race categories (such as White or Black). As a result, the totals shown here may exceed 100% when Hispanic is displayed alongside racial groups.

Pie Chart & Table Comparison Chart

Gender Breakdown

Simple chart showing male vs female share of the population in ZIP Code 51104. Chart loads automatically and replaces this content. Load Chart Manually (if needed)

Gender	Count	%	Median Age
Males:	11,309	49.00%	33.6 years
Females:	11,771	51.00%	36.7 years
Total:	23,080	100%	35.2 years

Source: U.S. Census Bureau (2020) Demographics & Housing Characteristics (DHC)

Nativity & Citizenship

Pie chart showing nativity in ZIP 51104. Categories include native residents (born in the United States, Puerto Rico, U.S. Island Areas, or abroad to American parents) and foreign-born residents. A table below lists counts and percentages. Chart loads automatically and replaces this content. Load Chart Manually (if needed)

Native, born in the United States:	20,006	87.78%
Native, born in PR, Island Areas, or abroad:	89	0.39%
Foreign born, naturalized U.S. citizen:	1,362	5.98%
Foreign born, not a U.S. citizen:	1,335	11.83%
Total Population:	22,792	100%
Total Native Population:	20,095	88.17%
Total Foreign-born Population:	2,697	11.83%

Source: U.S. Census 2019-2023 American Community Survey 5-Year Estimates. Table DP02. SELECTED SOCIAL CHARACTERISTICS

Note: Nativity and Citizenship derived from American Community Survey (ACS) 5-year estimates. Total Population listed here will not match official ZIP Code population totals, which are based on the Decennial Census.

Income & Employment

In 2023, the Median household income is $74,984, which is falls short of the national median ($78,538), is up $25,536 (51.6%) since 2011 and above its 2019 pre-pandemic level by $11,017. Family households earn a median of $90,776 versus $42,736 for nonfamily households (a difference of $48,040). By gender, male median income is $52,698 and female is $52,090, which is above the state female median ($49,410), with a current gap of $608 that has narrowed from 2011 to 2023. The labor-force participation rate is 71.1%, which is markedly above the national rate (63.5%). The unemployment rate is 4.7%, which is above the state rate (3.6%). The largest occupation group is Management (36.1%).

Explore More:Income Over Time Household Income Employment Status By Occupation

Source: U.S. Census 2011-2023 American Community Survey 5-Year Estimates. Using data from Tables DP02, DP03, DP04 and DP05.

Median Income Over Time (Household, Family, Nonfamily, Male, Female)

Line chart showing median income in ZIP 51104 from 2011-2023 for five series: household, family, nonfamily, male, and female. The table below lists the yearly values. Chart loads automatically and replaces this content. Load Chart Manually (if needed)

Income Type	2011	2012	2013	2014	2015	2016	2017	2018	2019	2020	2021	2022	2023
Median Household Income	$49,448	$50,950	$52,662	$55,387	$54,705	$55,830	$59,096	$63,592	$63,967	$64,539	$64,735	$74,734	$74,984
Median Family Income	$65,019	$64,353	$65,118	$67,189	$66,184	$65,890	$69,246	$72,262	$82,773	$71,171	$78,110	$89,189	$90,776
Median NonFamily Income	$30,389	$31,772	$32,490	$31,692	$31,393	$31,167	$31,060	$33,477	$37,125	$36,907	$36,529	$41,312	$42,736
Median Male Income	$46,262	$44,300	$43,607	$45,376	$45,175	$45,353	$46,291	$52,174	$47,899	$48,351	$49,167	$52,616	$52,698
Median Female Income	$34,079	$32,622	$31,502	$30,859	$30,413	$30,548	$32,260	$36,184	$38,304	$41,519	$43,549	$47,813	$52,090

Source: U.S. Census 2011-2023 American Community Survey 5-Year Estimates. DP03. SELECTED ECONOMIC CHARACTERISTICS

Average Household Income

Bar chart showing average household income comparing ZIP 51104, city of Sioux City, Woodbury County, state of Iowa, and United States national values. Chart loads automatically and replaces this content. Load Chart Manually (if needed)

Source: U.S. Census 2019-2023 American Community Survey 5-Year Estimates. Table DP03. SELECTED ECONOMIC CHARACTERISTICS

Pie Chart & Table Comparison Chart

Employment Status

Pie chart of employment status for ZIP 51104, showing the shares who are employed, unemployed, and not in the labor force. Chart loads automatically and replaces this content. Load Chart Manually (if needed)

Employed:	12,271	67.67%
Unemployed:	601	3.31%
Not In Labor Force:	5,261	29.01%
Total:	18,133	100%

Source: U.S. Census 2019-2023 American Community Survey 5-Year Estimates. Table DP03. SELECTED ECONOMIC CHARACTERISTICS

Employment by Occupation (Civilian Employed Population, 16 and Over)

Donut Chart showing the distribution of employed civilians aged 16 and over by occupation category: management, service, sales and office, natural resources and construction, and production and transportation. A table with the same data and percentages is provided as well.Load Chart Manually (if needed)

Management, business, science, and arts:	4,427	36.08%
Service:	1,916	15.61%
Sales and Office:	2,170	17.68%
Natural resources, construction, and maintenance:	1,158	9.44%
Production, transportation, and material moving:	2,600	21.19%
Total Civilian Employed Population:	12,271	100%

Source: U.S. Census 2019-2023 American Community Survey 5-Year Estimates. Table DP03. SELECTED ECONOMIC CHARACTERISTICS.

Housing & Affordability

In 2023, the median home value is $193,000, which is considerably lower than the national median ($303,400), is up $79,300 (69.74%) since 2011 and above its 2019 pre-pandemic level by $49,300. The median gross rent is $955, which is far less than the national median ($1,348), is up $255 (36.43%) since 2011 and above its 2019 pre-pandemic level by $108. Of occupied housing, owners make up 64.71% (68.95% with a mortgage, 31.05% free-and-clear) and renters 35.29% - making this ZIP Code less home ownership than the state and higher than national rental averages. The vacancy rate is 4.83%, which is markedly below the national rate (10.43%).

Explore More:Compare Home Value Home Value Over Time Rent & Over Time Housing Occupancy

Source: U.S. Census 2011-2023 American Community Survey 5-Year Estimates. Using data from Table DP03, SELECTED ECONOMIC CHARACTERISTICS.

Median Home Value (Comparison)

Bar chart showing the median home value for ZIP 51104, compared with Sioux City, Woodbury County, state of Iowa, and the U.S. National Average. Chart loads automatically and replaces this content. Load Chart Manually (if needed)

Source: U.S. Census 2019-2023 American Community Survey 5-Year Estimates. Table DP04. SELECTED HOUSING CHARACTERISTICS

Median Home Value Over Time

Line chart showing median home values for ZIP 51104 across years 2011-2023 using ACS 5-year estimates. The chart displays the typical dollar value of owner-occupied housing units. Chart loads automatically and replaces this content. Load Chart Manually (if needed)

Group	2011	2102	2013	2014	2015	2016	2017	2018	2019	2020	2021	2022	2023
Median Home Value	$113,700	$118,600	$115,800	$117,600	$117,300	$121,300	$128,600	$135,200	$143,700	$153,100	$160,700	$179,500	$193,000

Source: U.S. Census 2011-2023 American Community Survey 5-Year Estimates. DP04. SELECTED HOUSING CHARACTERISTICS

Gross Rent Paid

Pie chart of gross rent for renter-occupied homes in ZIP 51104, showing monthly rent brackets and the share of units in each range. Chart loads automatically and replaces this content. Load Chart Manually (if needed)

Less than $500:	173	5.65%
$500 to $999:	1,578	51.52%
$1,000 to $1,499:	913	29.81%
$1,500 to $1,999:	179	5.84%
$2,000 to $2,499:	85	2.78%
$2,500 to $2,999:	6	0.20%
$3,000 or more:	12	0.39%
No Rent:	117	3.82%
Total:	3,063	100%

Source: U.S. Census 2019-2023 American Community Survey 5-Year Estimates. Table DP04. SELECTED HOUSING CHARACTERISTICS

Median Gross Rent Over Time

Line chart displaying median gross rent for ZIP 51104 over the years 2011-2023 using ACS 5-year estimates. The chart represents typical monthly housing costs for renter households. Chart loads automatically and replaces this content. Load Chart Manually (if needed)

Group	2011	2102	2013	2014	2015	2016	2017	2018	2019	2020	2021	2022	2023
Median Rent	$700	$728	$730	$729	$749	$769	$778	$824	$847	$843	$865	$949	$955

Source: U.S. Census 2011-2023 American Community Survey 5-Year Estimates. DP04. SELECTED HOUSING CHARACTERISTICS

Housing Occupancy

Pie chart showing housing occupancy for ZIP 51104. Categories include owner-occupied units with a mortgage, owner-occupied units free and clear, and renter-occupied units. A table below lists counts and percentages. Vacant housing units are shown separately in the Vacancy chart. Chart loads automatically and replaces this content. Load Chart Manually (if needed)

Owner Occupied (with mortgage):	3,872	44.61%
Owner Occupied (free and clear, no mortgage):	1,744	20.09%
Renter Occupied:	3,063	35.29%
Total Occupied Housing Units:	8,679	100%

Occupied Housing Units:	8,679	95.17%
Vacant Housing Units (not graphed):	440	4.83%
Total Housing Units:	9,119	100%

Source: U.S. Census 2019-2023 American Community Survey 5-Year Estimates. Table DP04. SELECTED HOUSING CHARACTERISTICS

Housing Type (Single-Family, Multi-Family, Other)

Pie chart showing housing type distribution for ZIP 51104. Categories include single-family units (detached or attached), multi-family units (from 2 units up to 50 or more units), and other structures such as mobile homes or boats/RVs. A table below lists counts and percentages for each group.Load Chart Manually (if needed)

Single-Family Units:	6,897	75.63%
Multi-Family Units:	2,166	23.75%
Other Units:	56	0.61%
Total Housing Units:	9,119	100%

Source: U.S. Census 2019-2023 American Community Survey 5-Year Estimates. Table DP04. SELECTED HOUSING CHARACTERISTICS

Education, Health & Community

In 2023, 28.20% of adults (25+) have a bachelor's degree or higher, which is far lower than the national rate (35.00%). High school or higher is 88.80%, which is generally lower than the state rate (93.20%). The uninsured rate is 6.60%, which is modestly below the national rate (8.60%). The share of people in poverty is 7.40%, which is comparable to the national rate (8.70%), down 2.90 percentage points since 2011 and below its 2019 pre-pandemic level by 0.50 percentage points. This suggests a positive shift in the local economic and social landscape - higher incomes, steadier consumer demand, and a strengthening tax base. Among residents ages 3+, the largest enrollment group is elementary (46.76%). College enrollment is 20.98%, which is far lower than the national rate (26.70%), indicating the community may be more oriented toward vocational/trade or direct-to-workforce opportunities.

Explore More:Educational Attainment Health Insurance Poverty Over Time School Enrollment

Source: U.S. Census 2011-2023 American Community Survey 5-Year Estimates. Using data from Tables DP02 and DP03.

Educational Attainment of Adults (25 and Older)

Pie chart of educational attainment for adults (25+) in ZIP 51104, including each level from less than 9th grade to graduate/professional. Summary rows show high school or higher and bachelor's or higher. A table lists counts and percentages.Load Chart Manually (if needed)

Less than 9th grade:	966	6.47%
9th to 12th grade, no diploma:	711	4.76%
High school graduate (includes equivalency):	4,417	29.59%
Some college, no degree:	2,790	18.69%
Associate's degree:	1,829	12.25%
Bachelor's degree:	2,958	19.82%
Graduate or professional degree:	1,254	8.40%
Total:	14,925	100%
High school or higher:	13,248	88.76%
Bachelor's degree or higher:	4,212	28.22%

Source: U.S. Census 2019-2023 American Community Survey 5-Year Estimates. Table DP02. SELECTED SOCIAL CHARACTERISTICS

Pie Chart & Table Comparison Chart

Health Insurance Coverage by Type (Private, Public, Uninsured)

Pie chart illustrating health insurance coverage by type for ZIP Code 51104. Categories include private insurance, public coverage such as Medicare and Medicaid, and individuals with no health insurance. Chart loads automatically and replaces this content. Load Chart Manually (if needed)

Private Insurance:	14,959	59.73%
Public Insurance:	8,604	34.35%
No Insurance:	1,483	5.92%
Total:	25,046	100%
Has Health Insurance:	23,563	94.08%

Source: U.S. Census 2019-2023 American Community Survey 5-Year Estimates. Table DP03. SELECTED ECONOMIC CHARACTERISTICS

Percentage of People in Poverty Over Time (2011-2023)

Line chart displaying the share of families and people in ZIP 51104 whose income falls below the federal poverty threshold, using ACS 5-year estimates from 2011 through 2023. The chart shows year-to-year changes in the percentage of people in poverty. Chart loads automatically and replaces this content. Load Chart Manually (if needed)

Group	2011	2102	2013	2014	2015	2016	2017	2018	2019	2020	2021	2022	2023
% of People in Poverty	10.3%	9.4%	8.6%	8.0%	7.4%	7.3%	6.0%	6.2%	7.9%	8.2%	8.0%	8.8%	7.4%

Source: U.S. Census 2011-2023 American Community Survey 5-Year Estimates. DP03. SELECTED ECONOMIC CHARACTERISTICS

Note: Counts of Families & People in poverty are not published at the ZIP Code level due to small sample sizes. Percentages shown are survey estimates from the American Community Survey (ACS). They may differ from official poverty statistics. The U.S. Census Bureau defines poverty status by comparing a family's or individual's total income with federal poverty thresholds that vary by family size and composition.

School Enrollment by Education Level (Ages 3 and Older)

Pie Chart showing enrollment of residents ages 3 and older in Nursery School or Preschool, Kindergarten, Elementary (grades 1-8), High School (grades 9-12), and College or Graduate School. A table with the same data and percentages is provided as well.Load Chart Manually (if needed)

Nursery School, Preschool:	323	6.39%
Kindergarten:	156	3.08%
Elementary school (grades 1-8):	2,365	46.76%
High school (grades 9-12):	1,153	22.80%
College or graduate school:	1,061	20.98%
Total:	5,058	100%
Early Childhood:	479	9.47%
K-12 (Primary & Secondary School):	3,674	72.64%

Source: U.S. Census 2019-2023 American Community Survey 5-Year Estimates. Table DP02. SELECTED SOCIAL CHARACTERISTICS

City:	Sioux City, Iowa
County:	Woodbury County
Timezone:	Central (GMT -06:00)
Local Time:	7:19:37 PM
Population:	23,080 [See All]
Area Code:	712
Classification:	Standard [Normal Street Delivery]
Coordinates:	42.5350, -96.4024
Land Area:	7.475 sq mi
Quick Link:	https://www.zip-codes.com/zip-code/51104/zip-code-51104.asp

# Residential Mailboxes:	8,980Source: USPS
# Business Mailboxes:	253Source: USPS
Total Delivery Receptacles:	9,664Source: USPS
Single Family Delivery Units:	6,833Source: USPS
Multi Family Delivery Units:	1,680Source: USPS

# of Businesses:	295Source: CBP
1st Quarter Payroll:	$48,426,000Source: CBP
Annual Payroll:	$200,225,000Source: CBP
# of Employees:	4,147Source: CBP

CBSA Name:	Sioux City, IA-NE-SDSource: Census
CBSA Number:	43580Source: Census
CBSA Type:	MetroSource: Census
CBSA Division:	--Source: Census
CBSA Population:	144,007Source: Census
MSA:	Sioux City, IA-NE MSASource: Census
Land Area:	7.475 sq miSource: Census
Water Area:	0.001 sq miSource: Census

Congressional District:	04Source: USPS
Congressional Land Area:	22756.75 sq miSource: Census
PMSA:	--Source: Census
Intro Date:	< 2004-10Source: ZIP-Codes.com
Place FIPS Code:	1973335Source: Census
Place Name:	Sioux City city; IowaSource: Census

ZIP Code 51104 in Sioux City, IA

Population & Demographics

Population Over Time (with 2010 & 2020 Census Benchmarks)

Population by Age & Gender (Total, Male, Female)

Population by Race

Gender Breakdown

Nativity & Citizenship

Income & Employment

Median Income Over Time (Household, Family, Nonfamily, Male, Female)

Average Household Income

Employment Status

Employment by Occupation (Civilian Employed Population, 16 and Over)

Housing & Affordability

Median Home Value (Comparison)

Median Home Value Over Time

Gross Rent Paid

Median Gross Rent Over Time

Housing Occupancy

Housing Type (Single-Family, Multi-Family, Other)

Education, Health & Community

Educational Attainment of Adults (25 and Older)

Health Insurance Coverage by Type (Private, Public, Uninsured)

Percentage of People in Poverty Over Time (2011-2023)

School Enrollment by Education Level (Ages 3 and Older)

Business & Employment Statistics

Geography, Land Area, & Statistical Classifications

Adjacent & Nearby ZIP Codes

Schools in ZIP Code 51104

Colleges & Post Secondary Schools near ZIP Code 51104

Sources & References