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The location of North Liberty









Census Data for North Liberty ...

Population ...

The most recent Census Estimate<1> was for 2018 and it gave North Liberty a population of 19,239 people.

The last Decennial Census<2> was in 2010, which gave North Liberty a population of 13,374 people.

The city of North Liberty is located in Johnson County. The 2010 Census gave Johnson County a population of 130,882 people. This means that North Liberty had 10.22% of the county's total population, making it Johnson's 3rd most populous community.

At the same time, Iowa had a population of 3,046,355 people, meaning that North Liberty had 0.44% of the total population of Iowa - making it the state's 30th most populous community.

Area ...

When the Census Bureau conducts a census for a city like North Liberty, 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 North Liberty reflect the sampling area. Since the shape of the sampling area and the actual boundaries of North Liberty 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 North Liberty has a total area of 7.83 square miles [20.3 km²].

Johnson County has a land area of 614 square miles [1,590.4 km²]. At 7.83 square miles [20.3 km²], North Liberty has 1.28% 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° 44' 39"   (or 41.74°)             [Map]

Lon:   -91° 36' 52"   (or -91.61°)

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 (13,374 people) and land area (7.83 square miles [20.3 km²]) values from the 2010 Census, North Liberty had a population density of 1,707 people per square mile [659 people/km²].

In comparison, the 2000 Census shows North Liberty had a population of 5,367 people and a land area of 6.78 square miles [17.6 km²]. This gives a population density of 791 people per square mile [305.8 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 North Liberty. 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, North Liberty had 5,761 Housing Units<3> and with its population of 13,374 people, this averages 2.32 people per Housing Unit.

The 2010 Census shows North Liberty had a land area of 7.83 square miles [20.3 km²]. This translates to 735 Housing Units per square mile [284 housing units/km²].

From the Census of 2000: North Liberty had 2,377 Housing Units, a population of 5,367 people and a land area of 6.78 square miles [17.6 km²]. This gives a density of 2.26 people per Housing Unit and 350.7 Housing Units per square mile [135.4 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 North Liberty and you need to be careful when comparing 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).

Johnson County ...

The community of North Liberty is located in Johnson County.

The county had a population of 130,882 people at the 2010 Census. With it's population of 13,374 people, North Liberty represented 10.22% of the county's total.

In addition, where the city of North Liberty has a population density of 1,707 people per square mile [659 people/km²], Johnson County averages 213.1 people per square mile [82.3 people/km²].

For more information, please visit our Census Page for Johnson County.

Population Rings for North Liberty ...

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

  Radius   No of
    Communities    
2018
    Population    
Change
  Since 2010    
5 mi   [8 km]344,573+30.22%
10 mi   [16 km]10129,343+18.43%
15 mi   [24 km]16141,538+17.33%
20 mi   [32 km]23322,423+11.54%
25 mi   [40 km]38354,348+10.8%
30 mi   [48 km]54367,661+10.31%

Census-to-Census Observations ...

Introduction ...

When the Census Bureau takes a census count (or enumeration) for North Liberty, 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 North Liberty. 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 15.58% larger than the 2000 Census.

The 2010 Census shows that the total area for North Liberty was 7.83 square miles [20.3 km²]. Of this total, only a minor amount of the area is covered by water.

The 2000 Census shows a total area of 6.78 square miles [17.6 km²]. Of this total, only a minor amount of the area is covered by water.

Location ...

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

For the 2010 Census, the location was given as:

Lat:   41.744370°   (or 41°44'39" N)             [Map]

Lon:   -91.614508°   (or -91°36'52" W)

For the 2000 Census, the location given was:

Lat:   41.743029°   (or 41°44'34" N)             [Map]

Lon:   -91.607807°   (or -91°36'28" W)

The difference indicates that the U.S. Census Bureau moved the location of the polygon for the 2010 Census 1,887 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 (#2395256) to North Liberty. This identifier also marks a GSP point on the map, and that point lies within the boundaries of North Liberty. The GNIS point has been mapped to the latitude/longitude:

Lat:   41.743960°   (or 41°44'38" N)             [Map]

Lon:   -91.614671°   (or -91°36'52" W)

The GSP location given for the 2010 Census lies 155.9 feet to the north<6> of the point given by the GNIS for North Liberty. For more information about this and the relationship of the various Federal Codes, please visit our Misc Page for North Liberty.

Miscellaneous Information for North Liberty ...

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 Johnson County or the city of North Liberty:

The GNIS Codes ...

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

GNIS ID for North Liberty: 2395256

GNIS ID for Johnson County: 465240

GNIS ID for Iowa: 1779785

The FIPS Codes ...

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

State Code: 19 (Iowa)

County Code: 103 (Johnson County)

Place Code: 57360 (North Liberty)

State & County Code: 19/103 (Iowa / Johnson County)

State & Place Code: 19/57360 (Iowa / North Liberty)

Misc. Census Codes ...

North Liberty 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 North Liberty, it does identify addresses that are in (or near) North Liberty. 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 North Liberty: 52317<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 North Liberty.

Other Roadside Stops ...

Visit our Community Index for Iowa

About Johnson County

About Iowa

Off-the-Road Links ...

The official website of the U.S. Census Bureau


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

The official website for Johnson County: www.johnson-county.com/

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)


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 2018.

- Return to Citation

<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.

- Return to Citation

<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).

- Return to Citation

<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.

- Return to Citation

<5>The calculated bearing (or angle) to the 2010 Census location is 74 degrees and a distance of 1,887 feet.

- Return to Citation

<6>The calculated bearing (or angle) to the GNIS point is 343 degrees and a distance of 155.9 feet.

- Return to Citation

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

- Return to Citation





 

 

 

 

 


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This page was last modified: 27 Aug 2019