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Cairo, West Virginia

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Census Data for Cairo ...

Population ...

The most recent Census Estimate<1> was for 2017 and it gives Cairo a population of 262 people.

The last Decennial Census<2> was in 2010, giving Cairo a population of 281 people.

The town of Cairo is located in Ritchie County. The 2010 Census gave Ritchie County a population of 10,449 people. This means that Cairo had 2.69% of the county's total population, making it Ritchie's 4th most populous community.

At the same time, West Virginia had a population of 1,852,994 people, meaning that Cairo had 0.02% of the total population of West Virginia - making it the state's 200th most populous community.

Area ...

When the Census Bureau conducts a census for a town like Cairo, 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 town.

Things like the population, area and housing for Cairo reflect the sampling area. Since the shape of the sampling area and the actual boundaries of Cairo 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 Cairo has a total area of 0.49 square miles [1.3 km²]. Of this total, 0.47 square miles [1.2 km²] is land, with the balance (2.88%) being water (0.01 square miles [0 km²]).

Ritchie County has a land area of 452 square miles [1,170.7 km²]. At 0.47 square miles [1.2 km²], Cairo has 0.1% 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 at the center of the polygon). At the time of the 2010 Census, the sampling area was located at:

Lat:   39° 12' 26"   (or 39.21°)             [Map]

Lon:   -81° 9' 13"   (or -81.15°)

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 (281 people) and land area (0.47 square miles [1.2 km²]) values from the 2010 Census, Cairo had a population density of 578 people per square mile [223.2 people/km²].

In comparison, the 2000 Census shows Cairo had a population of 263 people and a land area of 0.49 square miles [1.3 km²]. This gives a population density of 536 people per square mile [207 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 Cairo. You need to be careful when making such a comparison, the differences are likely to lead to an apple-to-oranges 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, Cairo had 151 Housing Units<3> and with its population of 281 people, this averages 1.86 people per Housing Unit.

The 2010 Census shows Cairo had a land area of 0.47 square miles [1.2 km²]. This translates to 310.7 Housing Units per square mile [120 housing units/km²].

From the Census of 2000: Cairo had 140 Housing Units, a population of 263 people and a land area of 0.49 square miles [1.3 km²]. This gives a density of 1.88 people per Housing Unit and 285.4 Housing Units per square mile [110.2 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 Cairo 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).

Ritchie County ...

The community of Cairo is located in Ritchie County.

The county had a population of 10,449 people at the 2010 Census. With it's population of 281 people, Cairo represented 2.69% of the county's total.

In addition, where the town of Cairo has a population density of 578 people per square mile [223.2 people/km²], Ritchie County averages 23.12 people per square mile [8.93 people/km²].

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

Population Rings for Cairo ...

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

  Radius   No of
  Since 2010    
5 mi   [8 km]22,002-7.19%
10 mi   [16 km]43,403-7.8%
15 mi   [24 km]76,206-6.08%
20 mi   [32 km]1211,353-4.02%
25 mi   [40 km]2377,418-3.68%
30 mi   [48 km]2882,725-3.95%

Census-to-Census Observations ...

Introduction ...

When the Census Bureau takes a census count (or enumeration) for Cairo, 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 Cairo. 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 0.92% smaller than the 2000 Census.

The 2010 Census shows that the total area for Cairo was 0.49 square miles [1.3 km²]. Of this total, 0.47 square miles [1.2 km²] is land, with the balance (2.88%) being water (0.01 square miles [0 km²]).

The 2000 Census shows a total area of 0.49 square miles [1.3 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 Cairo, the latitude and longitude given by the Census Bureau actually indicates the GPS location of the polygon for Cairo.

For the 2010 Census, the location was given as:

Lat:   39.207326°   (or 39°12'26" N)             [Map]

Lon:   -81.153691°   (or -81°9'13" W)

For the 2000 Census, the location given was:

Lat:   39.208264°   (or 39°12'29" N)             [Map]

Lon:   -81.156600°   (or -81°9'23" W)

The difference indicates that the U.S. Census Bureau moved the location of the polygon for the 2010 Census 890 feet to the east<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 (#2390764) to Cairo. This identifier also marks a GSP point on the map, and that point lies within the boundaries of Cairo. The GNIS point has been mapped to the latitude/longitude:

Lat:   39.206699°   (or 39°12'24" N)             [Map]

Lon:   -81.154301°   (or -81°9'15" W)

The GSP location given for the 2010 Census lies 286.3 feet to the northeast<6> of the point given by the GNIS for Cairo. For more information about this and the relationship of the various Federal Codes, please visit our Misc Page for Cairo.

Miscellaneous Information for Cairo ...

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 Ritchie County or the town of Cairo:

The GNIS Codes ...

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

GNIS ID for Cairo: 2390764

GNIS ID for Ritchie County: 1689049

GNIS ID for West Virginia: 1779805

The FIPS Codes ...

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

State Code: 54 (West Virginia)

County Code: 085 (Ritchie County)

Place Code: 12124 (Cairo)

State & County Code: 54/085 (West Virginia / Ritchie County)

State & Place Code: 54/12124 (West Virginia / Cairo)

Misc. Census Codes ...

Cairo is located in Census Region #3 (the South Region) and Division #5 (the South Atlantic Division).

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

Other Roadside Stops ...

Find a Community in West Virginia

About Ritchie County

About West Virginia

Off-the-Road Links ...

The official website of the U.S. Census Bureau

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

The official website for State of West Virginia:

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 2017.

- 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 247 degrees and a distance of 890 feet.

- Return to Citation

<6>The calculated bearing (or angle) to the GNIS point is 322 degrees and a distance of 286.3 feet.

- Return to Citation


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This page was last modified: 13 Sep 2018
By John Hall