Ottumwa, IA Profile: Facts & Data


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Ottumwa, Iowa - Basic Facts

The City of Ottumwa had a population of 24,470 as of July 1, 2018. Ottumwa 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 Ottumwa is located at latitude 41.02 and longitude -92.4113 in Wapello County. The formal boundaries for the City of Ottumwa encompass a land area of 15.86 sq. miles and a water area of 0.67 sq. miles. Wapello County is in the Central time zone (GMT -6). The elevation is 673 feet.

The City of Ottumwa (GNIS ID: 2396110) has a C1 Census Class Code which indicates an active incorporated place that does not serve 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 Ottumwa is located within Township of Center, a minor civil division (MCD) of Wapello County.

Alternate Unofficial Names for Ottumwa: Louisville.

Jump to... (On This Page!)
  1. Ottumwa 2018 Demographic Data
  2. Growth Rates for Ottumwa (Historical & 5-Year Forecast)
  3. Peer Comparisons (Rank and Percentile)
  1. Neighborhoods Demographics (Home Values, Household Income, etc.)
  2. Iowa Research Tools (Easy Tools & Current Data)
  3. Iowa Data Comparison Tool - 2018 Demographics

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Ottumwa, IA Data & Demographics (As of July 1, 2018)


Total Population 24,470
Population in Households 23,713
Population in Familes 17,695
Population in Group Qrtrs 757
Population Density2 1,543
Diversity Index3 42


Median Household Income $39,935
Average Household Income $53,621
Per Capita Income $22,314


Total Housing Units 11,210 (100%)
Owner Occupied HU 6,488 (57.9%)
Renter Occupied HU 3,480 (31.0%)
Vacant Housing Units 1,242 (11.1%)
Median Home Value $82,808
Average Home Value $107,796


Total Households 9,968
Average Household Size 2.38
Family Households 5,975
Average Family Size 3
  1. Demographics are point estimates for July 1st of the current year and each for the forecast years. See References for more information.
  2. Population Density = Total Population per square mile.
  3. 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 race 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.


2010-2018 2018-2023
Population -0.27% -0.32%
Households -0.34% -0.38%
Families -0.46% -0.49%
Median Household Income   2.08%
Per Capita Income   2.13%

Ottumwa, IA - Peer Comparisons by Rank and Percentile

The table below compares Ottumwa to the other 1,009 incorporated cities, towns and CDPs in Iowa by rank and percentile using July 1, 2018 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.

Variable Description Rank Percentile
Total Population # 21 98th
Population Density # 87 91st
Diversity Index # 33 97th
Median Household Income # 971 4th
Per Capita Income # 965 4th

Additional comparisons and rankings can be made with a VERY EASY TO USE Iowa Census Data Comparison Tool.

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