A Gazetteer for the United States and Canada
Mount Vernon, Iowa
Census Data for Mount Vernon ...
The most recent Census Estimate<1> was for 2018 and it gave Mount Vernon a population of 4,454 people.
The last Decennial Census<2> was in 2010, which gave Mount Vernon a population of 4,506 people.
The city of Mount Vernon is located in Linn County. The 2010 Census gave Linn County a population of 211,226 people. This means that Mount Vernon had 2.13% of the county's total population, making it Linn's 4th most populous community.
When the Census Bureau conducts a census for a city like Mount Vernon, they draw a boundary around the area in which they are going to conduct their count - this defines the sampling area (usually shaped as 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 Mount Vernon reflect the sampling area. Since the shape of the sampling area and the actual boundaries of Mount Vernon might be different, it's best to check with the U.S. Census Bureau to resolve any difference between the two.
The 2010 Census shows that the sampling area for Mount Vernon has a total area of 3.5 square miles [9.1 km²]. Of this total, a small amount of the area is covered by water (0 square miles [0 km²]).
Linn County has a land area of 716 square miles [1,856.7 km²]. At 3.49 square miles [9 km²], Mount Vernon has 0.49% of the county's total land area.
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 the center of the polygon, known as the centroid). At the time of the 2010 Census, the sampling area was located at:
Lat: 41° 55' 25" (or 41.92°) [Map]
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 (4,506 people) and land area (3.49 square miles [9 km²]) values from the 2010 Census, Mount Vernon had a population density of 1,287 people per square mile [497.2 people/km²].
In comparison, the 2000 Census shows Mount Vernon had a population of 3,390 people and a land area of 3.48 square miles [9 km²]. This gives a population density of 971 people per square mile [375 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 Mount Vernon. You need to be careful when making such a comparison, the differences are likely to lead to a questionable comparison. More information about these differences can be found in the section Census-to-Census Observations ... (see below).
Housing Units ...
At the time of the 2010 Census, Mount Vernon had 1,397 Housing Units<3> and with its population of 4,506 people, this averages 3.23 people per Housing Unit.
The 2010 Census shows Mount Vernon had a land area of 3.49 square miles [9 km²]. This translates to 399.3 Housing Units per square mile [154.2 housing units/km²].
From the Census of 2000: Mount Vernon had 1,192 Housing Units, a population of 3,390 people and a land area of 3.48 square miles [9 km²]. This gives a density of 2.84 people per Housing Unit and 341.5 Housing Units per square mile [131.9 housing units/km²].
NOTE: Repeating the caution above (under Population Density), be aware that when comparing Housing Units between the 2000 Census and the 2010 Census, there were changes in the sampling area for Mount Vernon and you need to be careful when comparing values between the censuses. More information about the changes can be found in the section called Census-to-Census Observations ... (see below).
Linn County ...
The community of Mount Vernon is located in Linn County.
The county had a population of 211,226 people at the 2010 Census. With it's population of 4,506 people, Mount Vernon represented 2.13% of the county's total.
In addition, where the city of Mount Vernon has a population density of 1,287 people per square mile [497.2 people/km²], Linn County averages 294.6 people per square mile [113.8 people/km²].
For more information, please visit our Census Page for Linn County.
Population Rings for Mount Vernon ...
To help identify the number of people who live in Mount Vernon and the surrounding area, we have drawn concentric rings centered on Mount Vernon. We counted the number of communities within each ring and summed their populations.<4>
Census-to-Census Observations ...
When the Census Bureau takes a census count (or enumeration) for Mount Vernon, 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 Mount Vernon. 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.
There is only a very minor difference in the sampling area given between the 2010 Census and the 2000 Census.
The 2010 Census shows that the total area for Mount Vernon was 3.5 square miles [9.1 km²]. Of this total, only a minor amount of the area is covered by water.
The 2000 Census shows a total area of 3.49 square miles [9 km²]. Of this total, only a minor amount of the area is covered by water.
While generally coinciding with the GPS location (latitude/longitude) of Mount Vernon, the latitude and longitude given by the Census Bureau actually indicates the GPS location of the polygon for Mount Vernon.
For the 2010 Census, the location was given as:
Lat: 41.923650° (or 41°55'25" N) [Map]
For the 2000 Census, the location given was:
Lat: 41.924096° (or 41°55'26" N) [Map]
The difference indicates that the U.S. Census Bureau moved the location of the polygon for the 2010 Census 1,119 feet to the west<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 (#2395130) to Mount Vernon. This identifier also marks a GSP point on the map, and that point lies within the boundaries of Mount Vernon. The GNIS point has been mapped to the latitude/longitude:
Lat: 41.922973° (or 41°55'22" N) [Map]
The GSP location given for the 2010 Census lies 293.7 feet to the northeast<6> of the point given by the GNIS for Mount Vernon. For more information about this and the relationship of the various Federal Codes, please visit our Misc Page for Mount Vernon.
Miscellaneous Information for Mount Vernon ...
The Federal government has assigned various identifying codes to each community, county and state. At one time or another, the US Census Bureau has used one (or more) of the following identifiers when referring to either Linn County or the city of Mount Vernon:
The GNIS Codes ...
The current system of identification is called the Geographic Names Information System (GNIS). The following GNIS codes relate to Mount Vernon:
GNIS ID for Mount Vernon: 2395130
The FIPS Codes ...
An earlier (and largely obsolete) identification method was called the Federal Information Processing Standard (FIPS):
State Code: 19 (Iowa)
County Code: 113 (Linn County)
Place Code: 54840 (Mount Vernon)
Misc. Census Codes ...
Mount Vernon is located in Census Region #2 (the Midwest Region) and Division #4 (the West North-Central 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 Mount Vernon, it does identify addresses that are in (or near) Mount Vernon. 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 Mount Vernon: 52314<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 Mount Vernon.
Other Roadside Stops ...
Off-the-Road Links ...
The official website of the U.S. Census Bureau
The official website for Mount Vernon: www.cityofmtvernon.com/
The official website for Linn County: www.co.linn.ia.us/
The official website for State of Iowa: https://www.iowa.gov/
The official website of the U.S. Board on Geographic Names (BGN)
The official website of the U.S. Geological Survey (USGS)
Please keep in mind that we can not guarantee the accuracy or timeliness of the information on this website, so use with care. We encourage you to double-check the information that is critical to you.
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This page was last modified: 27 Aug 2019