A Gazetteer for the United States and Canada
Census Data for Plattsmouth ...
The most recent Census Estimate<1> was for 2017 and it gave Plattsmouth a population of 6,451 people.
The last Decennial Census<2> was in 2010, which gave Plattsmouth a population of 6,502 people.
The city of Plattsmouth is located in Cass County. The 2010 Census gave Cass County a population of 25,241 people. This means that Plattsmouth had 25.76% of the county's total population, making it Cass' most populous community.
When the Census Bureau conducts a census for a city like Plattsmouth, 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 Plattsmouth reflect the sampling area. Since the shape of the sampling area and the actual boundaries of Plattsmouth 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 Plattsmouth has a total area of 3.1 square miles [8 km²]. Of this total, a small amount of the area is covered by water (0 square miles [0 km²]).
Cass County has a land area of 557 square miles [1,443.8 km²]. At 3.1 square miles [8 km²], Plattsmouth has 0.56% 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° 0' 20" (or 41.01°) [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 (6,502 people) and land area (3.1 square miles [8 km²]) values from the 2010 Census, Plattsmouth had a population density of 2,096 people per square mile [809 people/km²].
In comparison, the 2000 Census shows Plattsmouth had a population of 6,887 people and a land area of 2.89 square miles [7.5 km²]. This gives a population density of 2,376 people per square mile [917 people/km²]
NOTE: Be aware that when comparing population density between the 2000 Census and the 2010 Census, there were changes in the sampling area for Plattsmouth. 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 differences can be found in the section Census-to-Census Observations ... (see below).
Housing Units ...
At the time of the 2010 Census, Plattsmouth had 2,863 Housing Units<3> and with its population of 6,502 people, this averages 2.27 people per Housing Unit.
The 2010 Census shows Plattsmouth had a land area of 3.1 square miles [8 km²]. This translates to 923 Housing Units per square mile [356.5 housing units/km²].
From the Census of 2000: Plattsmouth had 2,805 Housing Units, a population of 6,887 people and a land area of 2.89 square miles [7.5 km²]. This gives a density of 2.46 people per Housing Unit and 967 Housing Units per square mile [373.7 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 Plattsmouth and you need to be careful when comparing values between the censuses. More information about the nature of these the changes can be found in the section called Census-to-Census Observations ... (see below).
Cass County ...
The county had a population of 25,241 people at the 2010 Census. With it's population of 6,502 people, Plattsmouth represented 25.76% of the county's total.
In addition, where the city of Plattsmouth has a population density of 2,096 people per square mile [809 people/km²], Cass County averages 45.28 people per square mile [17.48 people/km²].
For more information, please visit our Census Page for Cass County.
Population Rings for Plattsmouth ...
To help identify the number of people who live in Plattsmouth and the surrounding area, we have drawn concentric rings centered on Plattsmouth. 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 Plattsmouth, 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 Plattsmouth. 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.
The sampling area (or polygon) given for the 2010 Census is 7% larger than the 2000 Census.
The 2010 Census shows that the total area for Plattsmouth was 3.1 square miles [8 km²]. Of this total, only a minor amount of the area is covered by water.
The 2000 Census shows a total area of 2.9 square miles [7.5 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 Plattsmouth, the latitude and longitude given by the Census Bureau actually indicates the GPS location of the polygon for Plattsmouth.
For the 2010 Census, the location was given as:
Lat: 41.005653° (or 41°0'20" N) [Map]
For the 2000 Census, the location given was:
Lat: 41.008699° (or 41°0'31" N) [Map]
The difference indicates that the U.S. Census Bureau moved the location of the polygon for the 2010 Census 1,306 feet to the southwest<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 (#2396229) to Plattsmouth. This identifier also marks a GSP point on the map, and that point lies within the boundaries of Plattsmouth. The GNIS point has been mapped to the latitude/longitude:
Lat: 41.005312° (or 41°0'19" N) [Map]
The GSP location given for the 2010 Census lies 124.3 feet to the north<6> of the point given by the GNIS for Plattsmouth. For more information about this and the relationship of the various Federal Codes, please visit our Misc Page for Plattsmouth.
Miscellaneous Information for Plattsmouth ...
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 Cass County or the city of Plattsmouth:
The GNIS Codes ...
The current system of identification is called the Geographic Names Information System (GNIS). The following GNIS codes relate to Plattsmouth:
GNIS ID for Plattsmouth: 2396229
The FIPS Codes ...
An earlier (and largely obsolete) identification method was called the Federal Information Processing Standard (FIPS):
State Code: 31 (Nebraska)
County Code: 025 (Cass County)
Place Code: 39345 (Plattsmouth)
Misc. Census Codes ...
Plattsmouth is located in Census Region #2 (the Midwest Region) and Division #4 (the West North-Central Division).
For more information about the various Federal identification codes, please visit our Misc Page for Plattsmouth.
Other Roadside Stops ...
Off-the-Road Links ...
The official website of the U.S. Census Bureau
Unfortunately, we don't know of a website for Plattsmouth. If you can help, please contact us through our Feedback Page.
The official website for Cass County: www.cassne.org/
The official website for State of Nebraska: www.nebraska.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: 15 Apr 2019