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Hamilton, Alabama
(Marion County)

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Census Data for Hamilton ...

Population ...

The most recent Census Estimate<1> was for 2017 and it gives Hamilton a population of 6,646 people.

The last Decennial Census<2> was in 2010, giving Hamilton a population of 6,885 people.

The city of Hamilton is located in Marion County. The 2010 Census gave Marion County a population of 30,776 people. This means that Hamilton had 22.37% of the county's total population, making it Marion's most populous community.

At the same time, Alabama had a population of 4,779,736 people, meaning that Hamilton had 0.14% of the total population of Alabama - making it the state's 81st most populous community.

Area ...

When the Census Bureau conducts a census for a city like Hamilton, 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 Hamilton reflect the sampling area. Since the shape of the sampling area and the actual boundaries of Hamilton 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 Hamilton has a total area of 38.08 square miles [98.6 km²]. Of this total, only a minor amount of the area is covered by water.

Marion County has a land area of 742 square miles [1,922.5 km²]. At 38.06 square miles [98.6 km²], Hamilton has 5.13% 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:   34° 8' 19"   (or 34.14°)             [Map]

Lon:   -87° 58' 15"   (or -87.97°)

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 (6,885 people) and land area (38.06 square miles [98.6 km²]) values from the 2010 Census, Hamilton had a population density of 180.8 people per square mile [69.8 people/km²].

In comparison, the 2000 Census shows Hamilton had a population of 6,786 people and a land area of 36.1 square miles [93.5 km²]. This gives a population density of 187.9 people per square mile [72.5 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 Hamilton. You need to be careful when making such a comparison, the differences are likely to lead to a questionable comparison. More information about the changes can be found in the section Census-to-Census Observations ... (see below).

Housing Units ...

At the time of the 2010 Census, Hamilton had 3,096 Housing Units<3> and with its population of 6,885 people, this averages 2.22 people per Housing Unit.

The 2010 Census shows Hamilton had a land area of 38.06 square miles [98.6 km²]. This translates to 81.3 Housing Units per square mile [31.39 housing units/km²].

From the Census of 2000: Hamilton had 3,065 Housing Units, a population of 6,786 people and a land area of 36.1 square miles [93.5 km²]. This gives a density of 2.21 people per Housing Unit and 84.9 Housing Units per square mile [32.76 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 Hamilton 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).

Marion County ...

The community of Hamilton is located in Marion County and is the County Seat for Marion County.

The county had a population of 30,776 people at the 2010 Census. With it's population of 6,885 people, Hamilton represented 22.37% of the county's total.

In addition, where the city of Hamilton has a population density of 180.8 people per square mile [69.8 people/km²], Marion County averages 41.46 people per square mile [16.01 people/km²].

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

Population Rings for Hamilton ...

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

  Radius   No of
  Since 2010    
5 mi   [8 km]16,646-3.47%
10 mi   [16 km]16,646-3.47%
15 mi   [24 km]912,505-3.64%
20 mi   [32 km]1521,176-3.85%
25 mi   [40 km]2435,308-2.79%
30 mi   [48 km]3358,870-2.9%

Census-to-Census Observations ...

Introduction ...

When the Census Bureau takes a census count (or enumeration) for Hamilton, 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 Hamilton. 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 5.43% larger than the 2000 Census.

The 2010 Census shows that the total area for Hamilton was 38.08 square miles [98.6 km²]. Of this total, only a minor amount of the area is covered by water.

The 2000 Census shows a total area of 36.12 square miles [93.5 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 Hamilton, the latitude and longitude given by the Census Bureau actually indicates the GPS location of the polygon for Hamilton.

For the 2010 Census, the location was given as:

Lat:   34.138710°   (or 34°8'19" N)             [Map]

Lon:   -87.970837°   (or -87°58'15" W)

For the 2000 Census, the location given was:

Lat:   34.135305°   (or 34°8'7" N)             [Map]

Lon:   -87.988980°   (or -87°59'20" W)

The difference indicates that the U.S. Census Bureau moved the location of the polygon for the 2010 Census 5,613 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 (#2403785) to Hamilton. This identifier also marks a GSP point on the map, and that point lies within the boundaries of Hamilton. The GNIS point has been mapped to the latitude/longitude:

Lat:   34.134957°   (or 34°8'5" N)             [Map]

Lon:   -87.974906°   (or -87°58'29" W)

The GSP location given for the 2010 Census lies 1,838 feet to the northeast<6> of the point given by the GNIS for Hamilton. For more information about this and the relationship of the various Federal Codes, please visit our Misc Page for Hamilton.

Miscellaneous Information for Hamilton ...

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 Marion County or the city of Hamilton:

The GNIS Codes ...

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

GNIS ID for Hamilton: 2403785

GNIS ID for Marion County: 161573

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: 093 (Marion County)

Place Code: 32848 (Hamilton)

State & County Code: 01/093 (Alabama / Marion County)

State & Place Code: 01/32848 (Alabama / Hamilton)

Misc. Census Codes ...

Hamilton 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 Hamilton, it does identify addresses that are in (or near) Hamilton. 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 Hamilton: 35570<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 Hamilton.

Other Roadside Stops ...

The Communities of Alabama

About Marion County

About Alabama

Off-the-Road Links ...

The official website of the U.S. Census Bureau

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

The official website for Marion County:

The official website for State of Alabama:

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.

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<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 282 degrees and a distance of 5,613 feet.

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<6>The calculated bearing (or angle) to the GNIS point is 318 degrees and a distance of 1,838 feet.

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<7>When looking for a ZIP Code, whether Hamilton 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: 15 Oct 2018
By John Hall