Onslow, IA Profile: Facts, Map & Data


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Onslow, Iowa - Basic Facts

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The City of Onslow had a population of 199 as of July 1, 2016.

The primary coordinate point for Onslow is located at latitude 42.1073 and longitude -91.0153 in Jones County. The formal boundaries for the City of Onslow (see map below) encompass a land area of 0.22 sq. miles and a water area of 0 sq. miles. Jones County is in the Central time zone (GMT -6). The elevation is 925 feet.

The City of Onslow (GNIS ID: 2396069) 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 Onslow is located within Township of Madison, a minor civil division (MCD) of Jones County.

Beneath the boundary map are tables with Onslow population, income and housing data, five-year growth projections and peer comparisons for key demographic data. The estimates are for July 1, 2016.

Neighborhood Data

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City of Onslow, IA Boundary Map

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Boundary Maps: Township of Madison | Jones County | Iowa Counties

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Onslow, IA Data & Demographics (As of July 1, 2016)


Total Population 199
Population in Households 199
Population in Familes 165
Population in Group Qrtrs 0
Population Density1 884
Diversity Index2 7


Total Households 95
Average Household Size 2.09
Family Households 66
Average Family Size 3


Total Housing Units 110 (100%)
Owner Occupied HU 72 (65.5%)
Renter Occupied HU 22 (20.0%)
Vacant Housing Units 15 (13.6%)
Median Home Value $103,125
Average Home Value $176,370


Median Household Income $60,714
Average Household Income $69,750
Per Capita Income $28,985
  (Compound Annual Growth Rates)


2010-2015 2015-2020
Population 0.16% 0.0%
Households 0.17% 0.0%
Families 3.89% 0.0%
Median Household Income   1.14%
Per Capita Income   1.29%
1) Population Density = Total Population per square mile.
2) The Diversity Index is a scale of 0 to 100 that represents the likelyhood 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.
Based on Census 2010 counts, the Diversity Index for the United States was 60.6 and it is expected to increase to 64.8 by July 1, 2018.

Onslow, IA - Peer Comparisons by Rank and Percentile

The table below compares Onslow to the other 1,009 incorporated cities, towns and CDPs in Iowa by rank and percentile using July 1, 2016 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 # 696 31st
Population Density1 # 370 63rd
Diversity Index2 # 673 32nd
Median Household Income # 204 80th
Per Capita Income # 334 67th

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

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