Saint Marys, CO Profile: Facts, Map & Data


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Saint Marys, Colorado - Basic Facts

The St. Mary's Census Designated Place had a population of 315 as of July 1, 2017. Saint Marys ranks in the lower quartile for Population Density and Diversity Index when compared to the other cities, towns and Census Designated Places (CDPs) in Colorado. See peer rankings below.

The primary coordinate point for Saint Marys is located at latitude 39.8165 and longitude -105.6471 in Clear Creek County. The formal boundaries for the St. Mary's Census Designated Place (see map below) encompass a land area of 1.44 sq. miles and a water area of 0.01 sq. miles. Clear Creek County is in the Mountain time zone (GMT -7). The elevation is 10,079 feet.

The St. Mary's Census Designated Place (GNIS ID: 2409229) has a U2 Census Class Code which indicates a census designated place without an official federally recognized name. It also has a Functional Status Code of "S" which identifies a statistical entity.

Colorado is one of 20 states where Census County Divisions (CCDs) are used for statistical tracking of subdivisions within each county. The St. Mary's Census Designated Place is located within Idaho Springs Division of Clear Creek 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.

Alternate Unofficial Names for Saint Marys: Saint Mary's.

Neighborhood Data

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St. Mary's Census Designated Place, CO Boundary Map

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Boundary Maps: Idaho Springs Division | Clear Creek County | Colorado Counties

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


Total Population 315
Population in Households 315
Population in Familes 234
Population in Group Qrtrs 0
Population Density1 219
Diversity Index2 19


Total Households 155
Average Household Size 2.03
Family Households 90
Average Family Size 3


Total Housing Units 338 (100%)
Owner Occupied HU 124 (36.7%)
Renter Occupied HU 30 ( 8.9%)
Vacant Housing Units 183 (54.1%)
Median Home Value $316,250
Average Home Value $348,600


Median Household Income $52,730
Average Household Income $62,643
Per Capita Income $31,218
  (Compound Annual Growth Rates)


2010-2015 2015-2020
Population 1.49% 1.36%
Households 1.51% 1.26%
Families 2.55% 1.3%
Median Household Income   3.98%
Per Capita Income   2.97%
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.

Saint Marys, CO - Peer Comparisons by Rank and Percentile

The table below compares Saint Marys to the other 458 incorporated cities, towns and CDPs in Colorado 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 # 313 32nd
Population Density1 # 354 23rd
Diversity Index2 # 387 16th
Median Household Income # 243 47th
Per Capita Income # 191 59th

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

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