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Saint Marys, Alaska

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Census Data for Saint Marys ...

Population ...

The most recent Census Estimate<1> was for 2016 and it gives Saint Marys a population of 550 people.

The last Decennial Census<2> was in 2010, giving Saint Marys a population of 507 people.

The 2010 Census gave Alaska had a population of 710,231 people, meaning that Saint Marys had 0.07% of the total population of Alaska - making it the state's 55th most populous community.

Area ...

When the Census Bureau conducts a census for a city like Saint Marys, they draw a boundary around the area in which they are going to conduct their count - this is called a sampling area (or a polygon). The shape of the sampling area can be quite complex and it's important to keep in mind that the boundaries of the sampling area may or may not match the recognized boundaries of the city.

Things like the population, area and housing for Saint Marys reflect the sampling area. Since the shape of the sampling area and the actual boundaries of Saint Marys might be slightly different, it's best to check with the U.S. Census Bureau if you need precision.

The 2010 Census shows that the sample polygon for Saint Marys has a total area of 50.6 square miles [131.1 km²]. Of this total, 44.29 square miles [114.7 km²] is land, with the balance (12.51%) being water (6.33 square miles [16.4 km²]).

Not only does the sampling area define boundaries, it also has a GPS location (latitude & longitude) that indicates a point within the sampling area (usually at the center of the polygon). At the time of the 2010 Census, the sampling area was located at:

Lat:   62° 3' 55"   (or 62.1°)             [Map]

Lon:   -163° 14' 58"   (or -163.25°)

More information on this topic and the changes between the 2000 Census and the 2010 Census can be found in the section for our Census-to-Census Observations ... (see below).

Population Density ...

Using the population (507 people) and land area (44.29 square miles [114.7 km²]) values from the 2010 Census, Saint Marys had a population density of 10.02 people per square mile [3.87 people/km²].

In comparison, the 2000 Census shows Saint Marys had a population of 500 people and a land area of 43.95 square miles [113.8 km²]. This gives a population density of 9.96 people per square mile [3.84 people/km²]

NOTE: Be aware that when comparing population density between the 2000 and the 2010 Census, there were changes in the sampling area for Saint Marys. You need to be careful when making such a comparison, the differences are likely to lead to a questionable comparison. More information about the nature of these changes can be found in the section Census-to-Census Observations ... (see below).

Housing Units ...

At the time of the 2010 Census, Saint Marys had 209 Housing Units<3> and with its population of 507 people, this averages 2.43 people per Housing Unit.

The 2010 Census shows Saint Marys had a land area of 44.29 square miles [114.7 km²]. This translates to 4.13 Housing Units per square mile [1.59 housing units/km²].

From the Census of 2000: Saint Marys had 186 Housing Units, a population of 500 people and a land area of 43.95 square miles [113.8 km²]. This gives a density of 2.69 people per Housing Unit and 3.7 Housing Units per square mile [1.43 housing units/km²].

NOTE: Repeating the caution above (under Population Density), be aware that when comparing Housing Units between the 2000 and the 2010 Census, there were changes in the sampling area for Saint Marys and you need to be careful when comparing numbers between the censuses. More information about the changes can be found in the section called Census-to-Census Observations ... (see below).

Population Rings for Saint Marys ...

To help identify the number of people who live in Saint Marys and the surrounding area, we have drawn concentric rings centered on Saint Marys. We counted the number of communities within each ring and summed their populations.<4>

  Radius   No of
  Since 2010    
5 mi   [8 km]1550+8.48%
10 mi   [16 km]1550+8.48%
15 mi   [24 km]21,157+7.63%
30 mi   [48 km]32,008+6.36%

Census-to-Census Observations ...

Introduction ...

When the Census Bureau takes a census count (or enumeration) for Saint Marys, they start by specifying the boundaries of the area to be counted. This area (or sampling area) is a polygon and its shape can be quite complex - it may or may not match the geographical boundaries of Saint Marys. It's important to note that from one Census to the next, the shape and location of the polygon can change. If you need precision or details about the methodology of the Census, you should visit the U.S. Census Bureau for a definitive answer.

Area ...

The sampling area (or polygon) given for the 2010 Census is 0.83% larger than the 2000 Census.

The 2010 Census shows that the total area for Saint Marys was 50.6 square miles [131.1 km²]. Of this total, 44.29 square miles [114.7 km²] is land, with the balance (12.51%) being water (6.33 square miles [16.4 km²]).

The 2000 Census shows a total area of 50.2 square miles [130 km²]. Of this total, 43.95 square miles [113.8 km²] is land, with the balance (12.36%) being water (6.26 square miles [16.2 km²]).

Location ...

While generally coinciding with the GPS location (latitude/longitude) of Saint Marys, the latitude and longitude given by the Census Bureau actually indicates the GPS location of the polygon for Saint Marys.

For the 2010 Census, the location was given as:

Lat:   62.065286°   (or 62°3'55" N)             [Map]

Lon:   -163.249479°   (or -163°14'58" W)

For the 2000 Census, the location given was:

Lat:   62.045305°   (or 62°2'43" N)             [Map]

Lon:   -163.218629°   (or -163°13'7" W)

The difference indicates that the U.S. Census Bureau moved the location of the polygon for the 2010 Census 8,991 feet to the northwest<5> of the location that was used in the 2000 Census.

The U.S. Geological Survey (USGS) and the U.S. Board on Geographic Names (BGN) have assigned a unique GNIS identifier (#2419459) to Saint Marys. This identifier also marks a GSP point on the map, and that point lies within the boundaries of Saint Marys. The GNIS point has been mapped to the latitude/longitude:

Lat:   62.071112°   (or 62°4'16" N)             [Map]

Lon:   -163.274290°   (or -163°16'27" W)

The GSP location given for the 2010 Census lies 4,739 feet to the southeast<6> of the point given by the GNIS for Saint Marys. For more information about this and the relationship of the various Federal Codes, please visit our Misc Page for Saint Marys.

Miscellaneous Information for Saint Marys ...

The Federal government has assigned various identifying codes to each community, county and state. At one time or another, the US Census Bureau has referenced one (or more) of the following identifiers when referring to either or the city of Saint Marys:

The GNIS Codes ...

The current system of identification is called the Geographic Names Information System (GNIS). The following GNIS codes relate to Saint Marys:

GNIS ID for Saint Marys: 2419459

GNIS ID for Alaska: 1785533

The FIPS Codes ...

An earlier (and largely obsolete) identification method was called the Federal Information Processing Standard (FIPS):

State Code: 02 (Alaska)

Place Code: 66140 (Saint Marys)

State & Place Code: 02/66140 (Alaska / Saint Marys)

Misc. Census Codes ...

Saint Marys is located in Census Region #4 (the West Region) and Division #9 (the Pacific Division).

The US Postal Service ZIP Code ...

While some people have used a ZIP code to identify a community, the purpose of the ZIP code was to make mail delivery more efficient by grouping addresses together. Although the ZIP Code doesn't specifically identify a city like Saint Marys, it does identify addresses that are in (or near) Saint Marys. It's important to remember that the boundaries of a ZIP Code can be changed, re-assigned or overlapped with other ZIP Codes.

The ZIP code for Saint Marys: 99658<7>

Census ZCTA Codes ...

The US Census Bureau created statistical entities that they call ZIP Code Tabulation Areas (ZCTAs) and these ZCTAs are frequently confused with the ZIP codes that come from the US Postal Service (USPS).

ZCTAs were first created for the 2000 Census and at that time, they were based upon the USPS ZIP codes. While largely covering the same areas, the boundaries of a ZCTA do not necessarily match the boundaries of a postal ZIP code with the same number. For example, while a postal ZIP code can cross a county or state line, a Census ZCTA can not. They should be treated as separate entities with no correlation between them.

For more information about the various Federal identification codes, please visit our Misc Page for Saint Marys.

Other Roadside Stops ...

Communities in Alaska

About Alaska

Off-the-Road Links ...

The official website of the U.S. Census Bureau

The official website of the U.S. Board on Geographic Names (BGN)

The official website of the U.S. Geological Survey (USGS)

Unfortunately, we don't know of a website for Saint Marys. If you can help, please contact us through our Feedback Page.

The official website for State of Alaska: alaska.gov/

Footnotes ...

<1>Every year, the US Census Bureau creates a population estimate for the preceeding year. Keep in mind that this value is an estimate and not an actual count. The most recent Census estimate is for the year 2016.

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<2>Every 10 years (eg- 1990, 2000, 2010), the US Census Bureau conducts a Constitutionally-mandated count (or enumeration) of people living within the United States. This count is called a Decennial Census. The last Decennial Census was the 2010 Census, with the next one planned for 2020.

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<3>A Housing Unit is a broad term for those places where people live (whether occupied or temporarily vacant), such as a house, an apartment, a mobile home, or an area that is considered as a separate living quarter. Separate living quarters (consisting of one or more rooms) are considered to be those places where people live, sleep and eat separately from others and that have access to the outside (either directly or by a shared hallway).

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<4>The communities in our count are those provided by the 2010 Census, so keep in mind that our population rings will only include the people living in those communities. Smaller communities usually don't participate directly in the Census and therefore they won't be included. While our count is a close approximation, it shouldn't be considered as a complete or accurate count.

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<5>The calculated bearing (or the angle) to the 2010 Census location is 35 degrees.

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<6>The calculated bearing (or the angle) to the GNIS point is 243 degrees.

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<7>When looking for a ZIP Code, whether Saint Marys or elsewhere, it's always best to check the website of the United States Postal Service (USPS).

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For additional information, please visit our Glossary for Saint Marys.