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Chambersburg, Pennsylvania

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Census Data for Chambersburg ...

Population ...

The most recent Census Estimate<1> was for 2019 and it gave Chambersburg a population of 21,278 people.

The last Decennial Census<2> was in 2010, which gave Chambersburg a population of 20,268 people.

The community of Chambersburg is located in Franklin County. The 2010 Census gave Franklin County; a population of 149,618 people. This means that Chambersburg had 13.55% of the county's total population, making it Franklin's most populous community.

At the same time, Pennsylvania had a population of 12,702,379 people, meaning that Chambersburg had 0.16% of the total population of Pennsylvania - making it the state's 27th most populous community.

Area ...

The 2010 Census shows that the sampling area for Chambersburg has a total area of 6.92 square miles [17.9 km²].

Franklin County has a land area of 772 square miles [2,000.1 km²]. At 6.92 square miles [17.9 km²], Chambersburg has 0.9% of the county's total land area.

  • Continue Reading ...
    • When the Census Bureau conducts a census for a community like Chambersburg, they draw a boundary around the area in which they are going to conduct their count - this defines the sampling area (usually 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 community.
    • Things like population, area and housing for Chambersburg reflect the sampling area. Since the shape of the sampling area and the actual boundaries of Chambersburg might be different, it's best to check with the U.S. Census Bureau to resolve any difference between the two.
    • 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:   39° 55' 53"   (or 39.93°)
    • Lon:   -77° 39' 20"   (or -77.66°)
    • 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).

Housing Units ...

At the time of the 2010 Census, Chambersburg had 9,086 Housing Units<3> and with its population of 20,268 people, this averages 2.23 people per Housing Unit.

  • Continue Reading ...
    • The 2010 Census shows Chambersburg had a land area of 6.92 square miles [17.9 km²]. This translates to 1,312 Housing Units per square mile [506 housing units/km²].
    • From the Census of 2000: Chambersburg had 8,305 Housing Units, a population of 17,862 people and a land area of 6.87 square miles [17.8 km²]. This gives a density of 2.15 people per Housing Unit and 1,209 Housing Units per square mile [467 housing units/km²].
    • Note: Repeating the caution above (under Population Density), be aware that when comparing Housing Units between the 2010 and the 2000 Census, there were changes in the sampling area for Chambersburg and you need to be careful when comparing results between the censuses. More information about the changes can be found in the section called Census-to-Census Observations ... (see below).

Franklin County ...

Chambersburg is located in Franklin County<4> and is the County Seat for Franklin County.

The county had a population of 149,618 people at the 2010 Census. With it's population of 20,268 people, Chambersburg represented 13.55% of the county's total.

In addition, where the community of Chambersburg has a population density of 2,926 people per square mile [1,130 people/km²], Franklin County averages 193.7 people per square mile [74.8 people/km²].

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

Census-to-Census Observations ...

Introduction ...

When the Census Bureau takes a census count (or enumeration) for Chambersburg, 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 Chambersburg. It's important to note that from one Census to the next, the shape and location of the polygon can change.

  • Continue Reading ...
    • Although we don't have specific information about the shape of the polygon for Chambersburg or how it changed has over time, there is some information that can give us some hints. For example, since the shape of the sampling area is directly related to the shape of the polygon, any change to area probably indicates a new shape for the polygon.
    • If you need precision or details about the methodology of the Census, you should visit the U.S. Census Bureau for a definitive answer.

Location ...

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

  • Continue Reading ...
    • For the 2010 Census, the location was given as:
    • Lat:   39.931433°   (or 39°55'53" N)
    • Lon:   -77.655642°   (or -77°39'20" W)
    • For the 2000 Census, the location given was:
    • Lat:   39.934813°   (or 39°56'5" N)
    • Lon:   -77.656352°   (or -77°39'22" W)
    • The difference indicates that the U.S. Census Bureau moved the location of the polygon for the 2010 Census 1,248 feet to the south<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 (#1215243) to Chambersburg. This identifier also marks a GPS point on the map, and that point lies within the boundaries of Chambersburg. The GNIS point has been mapped to the latitude/longitude:
    • Lat:   39.933980°   (or 39°56'2" N)
    • Lon:   -77.656658°   (or -77°39'23" W)
    • The GPS location given for the 2010 Census lies 971 feet to the south<6> of the point given by the GNIS for Chambersburg. For more information about this and the relationship of the various Federal Codes, please visit our Misc Page for Chambersburg.

Miscellaneous Information for Chambersburg ...

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 Franklin County or the community of Chambersburg:

  • The GNIS Codes ...
    • The current system of identification is called the Geographic Names Information System (GNIS). The following GNIS codes relate to Chambersburg:
    • GNIS ID for Chambersburg: 1215243
    • GNIS ID for Franklin County: 1213670
    • GNIS ID for State of Pennsylvania: 1779798
  • Misc. Census Codes ...
    • Chambersburg is located in Census Region #1 (the Northeast Region) and Division #2 (the Middle Atlantic 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 community like Chambersburg, it does identify addresses that are in (or near) Chambersburg. 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 Chambersburg:17201<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 Chambersburg.

Other Roadside Stops ...

Index of Cities, Towns and Villages for Pennsylvania

About Franklin County

About Pennsylvania

Off-the-Road Links ...

The official website for Chambersburg:

The official website for Franklin County:

The official website for State of Pennsylvania:

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)

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 2019.
<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.
<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).
<4>If you're interested in how the shape of Pennsylvania's counties, including Franklin, have changed over time, we recommend the Atlas of Historical County Boundaries.
<5>The calculated bearing (or angle) to the 2010 Census location is 189 degrees and a distance of 1,248 feet.
<6>The calculated bearing (or angle) to the GNIS point is 197 degrees and a distance of 971 feet.
<7>When looking for a ZIP Code, whether Chambersburg or elsewhere, it's always best to check the website of the United States Postal Service (USPS).






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This page was last modified: 27 Apr 2022