Saint Marys, IA Profile: Facts, Map & Data


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Saint Marys, Iowa - Basic Facts

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The City of Saint Marys had a population of 138 as of July 1, 2017. Saint Marys ranks in the upper 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 Saint Marys is located at latitude 41.3077 and longitude -93.7339 in Warren County. The formal boundaries for the City of Saint Marys (see map below) encompass a land area of 0.14 sq. miles and a water area of 0 sq. miles. Warren County is in the Central time zone (GMT -6). The elevation is 1,027 feet.

The City of Saint Marys (GNIS ID: 2396506) 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 Saint Marys is located within Township of Jackson, a minor civil division (MCD) of Warren County.

Beneath the boundary map are tables with Saint Marys 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

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City of Saint Marys, IA Boundary Map

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Boundary Maps: Township of Jackson | Warren County | Iowa Counties

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


Total Population 138
Daytime Population: Workers 70
Daytime Population: Residents 71
Total Daytime Population (TDP) 141
Ratio TDP/Total Population1 1.02
Population in Households 138
Population in Familes 124
Population in Group Qrtrs 0
Population Density2 989
Diversity Index3 15


Median Household Income $82,249
Average Household Income $93,246
Per Capita Income $33,818


Total Housing Units 50 (100%)
Owner Occupied HU 41 (82.0%)
Renter Occupied HU 5 ( 10.0%)
Vacant Housing Units 4 ( 8.0%)
Median Home Value $188,235
Average Home Value $266,250


Total Households 46
Average Household Size 3.0
Family Households 37
Average Family Size 3
  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 1.15% 1.41%
Households 1.26% 1.27%
Families 1.17% 1.06%
Median Household Income   1.25%
Per Capita Income   2.18%

Saint Marys, IA - Peer Comparisons by Rank and Percentile

The table below compares Saint Marys 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 # 802 21st
Population Density # 307 70th
Diversity Index # 260 75th
Median Household Income # 25 98th
Per Capita Income # 114 89th

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

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