City · Iowa
Sioux City, Iowa
Sioux City, city, mostly in Woodbury County (100.0% of its 2020 residents), with a part in Plymouth County, Iowa. Sioux City had 86,356 residents on July 1, 2025 by the Census Bureau's estimate, up 0.5% since 2020; the 2020 Census counted 85,797 and the ACS 2020-2024 5-year estimates put it at 86,101 (±29). GEOID 1973335.
Residents, July 2025 estimate
86,356
Census Bureau estimate (no margin published)
2020 Census count: 85,797 · ACS 2020-2024: 86,101 ±29
Median household income
$68,906
±$4,550 (90% margin)
Iowa: $75,059
Median home value
$173,600
±$4,089 (90% margin)
Iowa: $208,000
Median gross rent
$976
±$27 (90% margin)
Iowa: $972
Where is Sioux City and what county is it in?
Sioux City is a city mostly in Woodbury County (100.0% of its 2020 residents), with a part in Plymouth County, Iowa. It covers 59.2 square miles of land, 1,450 residents per square mile in 2020.
Sioux City is in the Sioux City, IA-NE-SD metropolitan statistical area, which takes in 3 counties (Census Bureau delineation, July 2023).
| County | 2020 residents | Share |
|---|---|---|
| Woodbury County | 85,791 | 100.0% |
| Plymouth County | 6 | 0.0% |
Source: 2024 Gazetteer and 2020 place-by-county files, U.S. Census Bureau · Census reference files
How many people live in Sioux City, and is it growing?
The Census Bureau estimates that 86,356 people lived in Sioux City on July 1, 2025, up 0.5% since 2020, slower than Iowa (+1.5%). The 2020 Census counted 85,797 residents. The 2020-2024 American Community Survey, a five-year sample, puts the population at 86,101 (±29).
| Measure | Sioux City | Woodbury County | Change since 2015-2019 |
|---|---|---|---|
| Total population | 86,101 ±29 | 106,247 | +3,570 |
| Households | 32,926 ±452 | 40,699 | +1,816 |
| Average household size | 2.53 ±0.03 | 2.54 | no clear change |
| Housing units | 35,001 ±317 | 43,388 | +1,229 |
Sioux City's population since 2000
From 85,013 in 2000 to 86,356 in 2025: up 1.6%. The 2000, 2010 and 2020 figures are census counts, each for Sioux City as it was drawn that year: a place that annexed land, or a community that has since incorporated, covered a different area then. The 2005 figure is the Census Bureau's intercensal estimate, revised to fit the 2000 and 2010 counts and drawn on 2010 boundaries; 2015 and 2025 are July 1 estimates made from the census before them.
Source: The 2000, 2010 and 2020 Census counts and the Census Bureau's population estimates (intercensal 2000-2010, Vintage 2020, Vintage 2025) · Census population estimates
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); Census PEP Vintage 2025 (SUB-EST2025, CO-EST2025); 2020 Census P.L. 94-171 · Check it at data.census.gov
Who lives in Sioux City?
The median resident of Sioux City is 34.9 years old; 26.1% are under 18 and 14.9% are 65 or older. The largest group is non-Hispanic white residents at 61.8%, then Hispanic or Latino residents (of any race) at 22.6%. 12.1% of residents were born outside the United States.
| Measure | Sioux City | Woodbury County | Change since 2015-2019 |
|---|---|---|---|
| Median age | 34.9 ±0.6 | 36.1 | no clear change |
| Under 18 years | 26.1% ±0.4 pts | 25.8% | – |
| 65 years and over | 14.9% ±0.4 pts | 15.9% | – |
| Male | 50.3% ±0.4 pts | 50.5% | – |
| Hispanic or Latino (any race) | 22.6% ±0.4 pts | 19.1% | +3.0 pts |
| White alone, not Hispanic | 61.8% ±0.7 pts | 67.1% | −6.5 pts |
| Black or African American alone, not Hispanic | 5.9% ±0.5 pts | 4.9% | +2.0 pts |
| Asian alone, not Hispanic | 2.4% ±0.4 pts | 2.3% | −1.0 pts |
| American Indian and Alaska Native alone, not Hispanic | 1.5% ±0.3 pts | 1.3% | – |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.9% ±0.1 pts | 0.7% | – |
| Two or more races, not Hispanic | 4.7% ±0.7 pts | 4.3% | – |
| Some other race alone, not Hispanic | 0.2% ±0.2 pts | 0.2% | – |
| Born outside the United States | 12.1% ±0.9 pts | 10.6% | +2.3 pts |
| Speak a language other than English at home (age 5+) | 21.6% ±1.4 pts | 18.5% | – |
| Civilian veterans (age 18+) | 5.3% ±0.6 pts | 5.7% | – |
| With a disability | 13.9% ±0.9 pts | 13.5% | – |
| No health insurance coverage | 8.4% ±0.9 pts | 7.3% | +2.0 pts |
| High school graduate or higher (age 25+) | 85.6% ±1.2 pts | 87.6% | – |
| Bachelor's degree or higher (age 25+) | 22.9% ±1.4 pts | 24.3% | no clear change |
| Graduate or professional degree (age 25+) | 8.0% ±0.9 pts | 8.4% | – |
| Lived in the same house a year earlier | 91.3% ±1.1 pts | 91.4% | – |
| Moved from another state in the past year | 2.5% ±0.6 pts | 2.3% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profiles DP02, DP05) · Check it at data.census.gov
What do households in Sioux City earn?
Half of Sioux City's 32,926 households earn less than $68,906 a year (±$4,550), against $73,658 in Woodbury County and $75,059 in Iowa. In 2015-2019 it was $68,221 in 2024 dollars; the margins of error cannot tell the two periods apart. 15.3% of residents live below the poverty line.
| Measure | Sioux City | Woodbury County | Change since 2015-2019 |
|---|---|---|---|
| Median household income | $68,906 ±$4,550 | $73,658 | no clear change |
| Mean household income | $86,214 ±$3,658 | $90,682 | – |
| Per capita income | $33,795 ±$1,388 | $35,564 | no clear change |
| People below the poverty line | 15.3% ±1.6 pts | 14.0% | no clear change |
| Children under 18 below the poverty line | 20.4% ±3.1 pts | 18.0% | no clear change |
| Households receiving SNAP | 14.2% ±1.5 pts | 12.6% | – |
| Households with a computer | 93.8% ±1.1 pts | 94.0% | – |
| Households with a broadband subscription | 86.9% ±1.6 pts | 87.3% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP03) · Check it at data.census.gov
What does housing cost in Sioux City?
Owners occupy 65.3% of Sioux City's occupied homes and renters 34.7%. The median owner-occupied home is valued at $173,600 by its owner (±$4,089). The median renter pays $976 a month including utilities, and 37.0% of renters pay 35% or more of their income on rent.
| Measure | Sioux City | Woodbury County | Change since 2015-2019 |
|---|---|---|---|
| Median home value (owner-occupied) | $173,600 ±$4,089 | $183,200 | +$30,101 |
| Median gross rent | $976 ±$27 | $981 | no clear change |
| Renters paying 35% or more of income on rent | 37.0% ±4.2 pts | 36.4% | no clear change |
| Median monthly owner costs, with a mortgage | $1,383 ±$46 | $1,428 | – |
| Owner-occupied homes | 65.3% ±2.0 pts | 68.2% | no clear change |
| Renter-occupied homes | 34.7% ±2.0 pts | 31.8% | – |
| Housing units | 35,001 ±317 | 43,388 | +1,229 |
| Homeowner vacancy rate | 1.1% ±0.7 pts | 1.0% | – |
| Rental vacancy rate | 4.3% ±1.7 pts | 5.1% | – |
| Single-family detached homes | 69.8% ±1.9 pts | 72.2% | – |
| Mobile homes | 3.2% ±0.8 pts | 3.5% | – |
| Built 2020 or later | 1.3% ±0.4 pts | 1.2% | – |
| Built 2010 to 2019 | 3.8% ±0.8 pts | 5.1% | – |
| Built 1939 or earlier | 32.0% ±1.6 pts | 30.7% | – |
| Households with no vehicle | 7.0% ±1.0 pts | 6.1% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP04) · Check it at data.census.gov
How many new homes is Sioux City building?
Builders took permits for 202 new housing units in Sioux City in 2025 (110 in single-family houses), 2.3 per 1,000 residents against 4.2 across Iowa.
Counts of units in permits a local office issued; not every permitted unit is built. A year marked with months was reported for part of the year.
Source: Building Permits Survey, annual place files 2019-2025, U.S. Census Bureau · Census Building Permits Survey
How do people in Sioux City work and get to work?
79.5% of Sioux City's workers drive alone and 5.0% work from home. The average trip to work takes 17.5 minutes. The unemployment rate in 2020-2024 averaged 4.5%.
| Measure | Sioux City | Woodbury County | Change since 2015-2019 |
|---|---|---|---|
| In the labor force (age 16+) | 67.3% ±1.2 pts | 67.2% | – |
| Unemployment rate | 4.5% ±0.9 pts | 4.1% | no clear change |
| Drove alone to work | 79.5% ±2.0 pts | 79.5% | – |
| Carpooled | 11.7% ±1.5 pts | 11.2% | – |
| Public transportation | 1.3% ±0.6 pts | 1.1% | – |
| Walked | 1.7% ±0.5 pts | 1.9% | – |
| Worked from home | 5.0% ±1.1 pts | 5.6% | +2.0 pts |
| Mean travel time to work | 17.5 min ±1.0 | 18.1 min | no clear change |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP03) · Check it at data.census.gov
What census tracts are in Sioux City?
23 census tracts lie mostly in Sioux City, and 3 more reach into it (2020 census blocks). Their median household incomes run from $38,193 (Tract 36) to $121,136 (Tract 21.01).
| Tract | Residents, 2020-2024 | Median household income |
|---|---|---|
| Tract 21.02Woodbury County | 6,756 | $77,360 |
| Tract 3Woodbury County | 5,609 | $74,279 |
| Tract 4Woodbury County | 5,249 | $102,385 |
| Tract 20Woodbury County | 5,245 | $70,000 |
| Tract 1Woodbury County | 5,124 | $52,883 |
| Tract 11Woodbury County | 4,580 | $62,478 |
| Tract 8Woodbury County | 4,210 | $56,067 |
| Tract 18.01Woodbury County | 4,030 | $72,371 |
| Tract 14Woodbury County | 3,993 | $60,870 |
| Tract 2.01Woodbury County | 3,700 | $78,750 |
| Tract 2.02Woodbury County | 3,684 | $56,944 |
| Tract 12Woodbury County | 3,316 | $59,953 |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); 2020 block assignment files (tract share = share of the tract's census blocks in Sioux City) · Census block assignment files
How does Sioux City compare with other places in Iowa?
By the Census Bureau's July 2025 estimates, Sioux City is the 420th-most populous of the 19,476 U.S. incorporated places that have one and the 4th-most populous of 939 in Iowa.
Sioux City ranks 150th of 279 places in Iowa with 1,000 or more residents and a reliable estimate, by median household income.
| Measure | Rank | Of |
|---|---|---|
| Population, July 2025 estimate | 4th | 939 |
| Growth 2020-2025 (PEP) | 106th | 275 |
| Residents per square mile | 57th | 279 |
| Median household income | 150th | 279 |
| Per capita income | 205th | 279 |
| Median home value | 129th | 279 |
| Median gross rent | 57th | 266 |
| Poverty rate | 43rd | 232 |
| Bachelor's degree or higher | 159th | 279 |
| Median age | 238th | 279 |
| Owner-occupied share | 229th | 279 |
| Work from home | 198th | 221 |
| Travel time to work | 198th | 279 |
Sioux City's figures with every place in Iowa (CSV)
Every place in Iowa, sortable · Compare Sioux City with other places
Source: PlainCities ranks computed from the American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) and PEP Vintage 2025 · How ranks are computed
How reliable are the figures for Sioux City?
1 of the 57 figures for Sioux City on this page carries a coefficient of variation over 40% and is marked with a ring: they come from a small sample, so read them as rough.
The American Community Survey samples about one household in eight over five years, so every figure is an estimate with a 90% margin of error (shown under each value). A ring marks an estimate whose coefficient of variation is over 40%. A change is called only when the gap between the two periods is larger than their combined 90% margin (the square root of the sum of the two squared margins), the Census Bureau's test. How to read a margin of error.
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026): margins of error as published · ACS technical documentation
How these figures are made: methodology and release checks · reading a margin of error · every state · corrections
Not on this page: crime, weather and schools for Sioux City are other agencies' records. Crime: the FBI's Crime Data Explorer · climate: NOAA's U.S. Climate Normals · schools: the National Center for Education Statistics' public schools in Sioux City.