Sioux City, IA Profile: Facts & Data

The City of Sioux City is the 4th largest city in Iowa with a population of 86,325 as of July 1, 2025. Sioux City ranks in the upper quartile for Population Density and Diversity Index when compared to the other cities, towns and Census Designated Places (CDPs) in Iowa. See peer rankings below.

The primary coordinate point for Sioux City is located at latitude 42.5 and longitude -96.4003 in Woodbury County. The formal boundaries for the City of Sioux City encompass a land area of 58.07 sq. miles and a water area of 1.16 sq. miles. Woodbury County is in the Central time zone (GMT -6).

The City of Sioux City has a C5 Census Class Code which indicates an active incorporated place that is independent of any county subdivision and serves as a county subdivision equivalent. It also has a Functional Status Code of "A" which identifies an active government providing primary general-purpose functions.

The City of Sioux City is located within , a minor civil division (MCD) of Woodbury County.

Sioux City, IA Data & Demographics (As of July 1, 2025)

POPULATION
Total Population	86,325 (100%)
Population in Households	83,639 (96.9%)
Population in Families	65,132 (75.4%)
Population in Group Quarters¹	2,686 ( 3.1%)
Population Density	1,459
Diversity Index²	71


INCOME
Median Household Income	$63,694
Average Household Income	$83,716
% of Income for Mortgage⁴	18%
Per Capita Income	$31,447
Wealth Index⁵	62
Socioeconomic Status Index⁶	Low (44.7)

HOUSING
Total HU (Housing Units)	34,911 (100%)
Owner Occupied HU	19,836 (56.8%)
Renter Occupied HU	12,535 (35.9%)
Vacant Housing Units	2,540 ( 7.3%)
Median Home Value	$182,029
Average Home Value	$212,045
Housing Affordability Index³	117

HOUSEHOLDS
Total Households	32,371
Average Household Size	2.58
Family Households	19,696
Average Family Size	3.00

NOTES

Group Quarters - a place where people live or stay in a group living arrangement. Includes college residents halls, nursing facilities, military barracks, and correctional facilities.
The Diversity Index is a scale of 0 to 100 that represents the likelihood that two persons, chosen at random from the same area, belong to different races or ethnic groups. If an area's entire population belongs to one race AND one ethnic group, then the area has zero diversity. An area's diversity index increases to 100 when the population is evenly divided into two or more race/ethnic groups.
The Housing Affordability Index base is 100 and represents a balance point where a resident with a median household income can normally qualify to purchase a median price home. Values above 100 indicate increased affordability, while values below 100 indicate decreased affordability.
The % of Income for Mortgage quantifies the percentage of median household income dedicated to mortgage payments on a home priced at the median value (assuming a 30-year mortgage and a 20% down payment).
The Wealth Index is based on a number of indicators of affluence including average household income and average net worth, but it also includes the value of material possessions and resources. It represents the wealth of the area relative to the national level. Values above or below 100 represent above-average wealth or below-average wealth compared to the national level.
The Socioeconomic Index ranges from zero (lowest relative status) to 100 (highest relative status). This measure quantifies disparities in social position of an area's inhabitants and is built from a broad range of demographic, housing, and socioeconomic inputs. More information on this measure can be found in Esri's SEI tutorial.

Sioux City, IA - Peer Comparisons by Rank and Percentile

The table below compares Sioux City to the other 1,026 incorporated cities, towns and CDPs in Iowa by rank and percentile using July 1, 2025 data. The location Ranked # 1 has the highest value. A location that ranks higher than 75% of its peers would be in the 75th percentile of the peer group.

GROWTH RATE / YEAR	2020-2025	2025-2030
Population	0.11%	0.11%
Households	0.11%	0.12%
Families		-0.09%
Median Household Income		2.45%
Per Capita Income		1.90%
Owner Occupied HU		0.34%

Variable Description	Rank	Percentile
Total Population	# 4	100th
Population Density	# 85	92nd
Median Household Income	# 797	22nd
Housing Affordability Index	# 497	48th
Per Capita Income	# 916	11th
Diversity Index	# 13	99th

Sioux City, IA Profile: Facts & Data

Sioux City, Iowa - Basic Facts

Sioux City, IA Data & Demographics (As of July 1, 2025)

POPULATION

INCOME

HOUSING

HOUSEHOLDS

GROWTH RATE / YEAR

Sioux City, IA - Peer Comparisons by Rank and Percentile

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