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A Gazetteer for the United States and Canada

Clay, Alabama

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 The location of Clay 

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Census Data for Clay ...

Population ...

The most recent Census Estimate<1> was for 2015 and it gives Clay a population of 9,655 people.

The last Decennial Census<2> was in 2010, giving Clay a population of 9,708 people.

The city of Clay is located in Jefferson County. The 2010 Census gave Jefferson County a population of 658,466 people. This means that Clay had 1.47% of the county's total population, making it Jefferson's 15th most populous community.

At the same time, Alabama had a population of 4,779,736 people, meaning that Clay had 0.2% of the total population of Alabama - making it the state's 65th most populous community.

Area ...

When the Census Bureau conducts a census for a city like Clay, 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 city.

Things like the population, area and housing for Clay reflect the sampling area. Since the shape of the sampling area and the actual boundaries of&$160;Clay 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 Clay has a total area of 9.99 square miles [25.9 km²]. Of this total, a small amount of the area is covered by water (0.06 square miles [0.2 km²]).

Jefferson County has a land area of 1,111 square miles [2,878.2 km²]. At 9.93 square miles [25.7 km²], Clay has 0.89% of the county's total land area.

Population Density ...

Using the population (9,708 people) and land area (9.93 square miles [25.7 km²]) values from the 2010 Census, Clay had a population density of 971 people per square mile [375 people/km²].

Housing Units ...

At the time of the 2010 Census, Clay had 3,799 Housing Units<3> and with its population of 9,708 people, this averages 2.56 people per Housing Unit.

The 2010 Census shows Clay had a land area of 9.93 square miles [25.7 km²]. This translates to 380.1 Housing Units per square mile [146.8 housing units/km²].

Jefferson County ...

The community of Clay is located in Jefferson County.

The county had a population of 658,466 people at the 2010 Census. With it's population of 9,708 people, Clay represented 1.47% of the county's total.

In addition, where the city of Clay has a population density of 971 people per square mile [375 people/km²], Jefferson County averages 592 people per square mile [228.8 people/km²].

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

Population Rings for Clay ...

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

RadiusNo of
Since 2010
5 mi [8 km]558,967+2.03%
10 mi [16 km]980,573+2.92%
15 mi [24 km]22149,416+2.83%
20 mi [32 km]34466,497+1.37%
25 mi [40 km]51611,341+1.92%
30 mi [48 km]69704,169+1.79%

US Census QuickFacts ...

The Census Bureau has created documents containing demographic information called QuickFacts. Although they don't create QuickFacts for all communities, they do have one for Clay. Not only does the QuickFact have details about Clay, it also contains a comparison between Clay and the state of Alabama.

Click here for the Clay QuickFact (QF-0115256).

The following communities are near Clay and also have Census QuickFacts:

2015 Est.
Since 2010
PinsonQF-01606487,438+3.84%   W  
TrussvilleQF-017694421,023+5.47%   S  
Center PointQF-011326416,655-1.57%   SW  
MoodyQF-015109612,593+7.39%   SE  
LeedsQF-014196811,936+1.38%   S  
FultondaleQF-01285529,048+7.97%   SW  
GardendaleQF-012905613,711-1.31%   W  
IrondaleQF-013786412,423+0.6%   S  

For more about neighboring communities, please visit our Nearby Page for Clay. For an expanded list of the communities that are closest to Clay, see our County-by-County Page for Clay.

A Census QuickFact is available for Jefferson County (QF-01073).

Below are QuickFacts for the counties that border Jefferson County.

2015 Est.
Since 2010
BibbQF-0100722,583-1.45%   SW  
BlountQF-0100957,673+0.61%   NE  
Saint ClairQF-0111587,074+4.16%   E  
ShelbyQF-01117208,713+6.99%   SE  
TuscaloosaQF-01125203,976+4.79%   SW  
WalkerQF-0112765,294-2.58%   NW  

Miscellaneous Information for Clay ...

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 Jefferson County or the city of Clay:

The GNIS Codes ...

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

GNIS ID for Clay: 2404063

GNIS ID for Jefferson County: 161562

GNIS ID for Alabama: 1779775

The FIPS Codes ...

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

State Code: 01 (Alabama)

County Code: 073 (Jefferson County)

Place Code: 15256 (Clay)

State & County Code: 01/073 (Alabama / Jefferson County)

State & Place Code: 01/15256 (Alabama / Clay)

Misc. Census Codes ...

Clay is located in Census Region #3 (the South Region) and Division #6 (the East South-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 Clay, it does identify addresses that are in (or near) Clay. 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 Clay: 35048<5>

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 Clay.

Other Roadside Stops ...

Find a Community located in Alabama

About Jefferson County

About Alabama

Off-the-Road Links ...

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)

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

The official website for Jefferson County:

The official website for State of Alabama:

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 2015.

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

- Return to Citation

For additional information, please visit our Glossary for Clay.


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This page was last modified: 23 Dec 2016
By John Hall