Portsmouth, IA Profile: Facts, Map & Data


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Portsmouth, Iowa - Basic Facts

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The City of Portsmouth had a population of 209 as of July 1, 2017. Portsmouth ranks in the lower quartile for 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 Portsmouth is located at latitude 41.6503 and longitude -95.5195 in Shelby County. The formal boundaries for the City of Portsmouth (see map below) encompass a land area of 0.28 sq. miles and a water area of 0 sq. miles. Shelby County is in the Central time zone (GMT -6). The elevation is 1,220 feet.

The City of Portsmouth (GNIS ID: 2396260) 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 Portsmouth is located within Township of Cass, a minor civil division (MCD) of Shelby County.

Beneath the boundary map are tables with Portsmouth population, income and housing data, five-year growth projections and peer comparisons for key demographic data. The estimates are for July 1, 2017.

Neighborhood Data

Address Based Hyperlocal Data Input an address and get data & demographics for the pertinent census block group (CBG), a searchable map and a customized directory. The CBG is the smallest geographical unit used by the Census Bureau for reporting certain data.


City of Portsmouth, IA Boundary Map

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Boundary Maps: Township of Cass | Shelby County | Iowa Counties

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Portsmouth, IA Data & Demographics (As of July 1, 2017)


Total Population 209
Daytime Population: Workers 27
Daytime Population: Residents 87
Total Daytime Population (TDP) 114
Ratio TDP/Total Population1 0.55
Population in Households 209
Population in Familes 179
Population in Group Qrtrs 0
Population Density2 758
Diversity Index3 5


Median Household Income $47,816
Average Household Income $66,535
Per Capita Income $27,178


Total Housing Units 99 (100%)
Owner Occupied HU 80 (80.8%)
Renter Occupied HU 22 (22.2%)
Vacant Housing Units 0
Median Home Value $148,438
Average Home Value $164,506


Total Households 102
Average Household Size 2.05
Family Households 73
Average Family Size 2
  1. If the ratio of the TDP to Total Population is greater than 1, the location gains population during the day when commuting workers are present. If the ratio is less than 1, the location is more of a bedroom community where people commute to another place for work.
  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.


2010-2017 2017-2022
Population 0.96% 0.38%
Households 1.13% 0.39%
Families 2.98% 0.27%
Median Household Income   3.86%
Per Capita Income   2.61%

Portsmouth, IA - Peer Comparisons by Rank and Percentile

The table below compares Portsmouth to the other 1,009 incorporated cities, towns and CDPs in Iowa by rank and percentile using July 1, 2017 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 # 689 32nd
Population Density # 449 56th
Diversity Index # 872 13th
Median Household Income # 754 25th
Per Capita Income # 524 48th

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

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