A Gazetteer for the United States and Canada
Census Data for Sulphur ...
The most recent Census Estimate<1> was for 2018 and it gave Sulphur a population of 20,230 people.
The last Decennial Census<2> was in 2010, which gave Sulphur a population of 20,410 people.
The city of Sulphur is located in Calcasieu Parish. The 2010 Census gave Calcasieu Parish a population of 192,768 people. This means that Sulphur had 10.59% of the parish's total population, making it Calcasieu's 2nd most populous community.
When the Census Bureau conducts a census for a city like Sulphur, 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 Sulphur reflect the sampling area. Since the shape of the sampling area and the actual boundaries of Sulphur 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 Sulphur has a total area of 9.99 square miles [25.9 km²].
Calcasieu Parish has a land area of 1,063 square miles [2,754.9 km²]. At 9.99 square miles [25.9 km²], Sulphur has 0.94% of the parish'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: 30° 13' 49" (or 30.23°) [Map]
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 (20,410 people) and land area (9.99 square miles [25.9 km²]) values from the 2010 Census, Sulphur had a population density of 2,042 people per square mile [788 people/km²].
In comparison, the 2000 Census shows Sulphur had a population of 20,512 people and a land area of 10.04 square miles [26 km²]. This gives a population density of 2,042 people per square mile [788 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 Sulphur. You need to be careful when making such a comparison, the differences are likely to lead to a misleading 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, Sulphur had 9,053 Housing Units<3> and with its population of 20,410 people, this averages 2.25 people per Housing Unit.
The 2010 Census shows Sulphur had a land area of 9.99 square miles [25.9 km²]. This translates to 906 Housing Units per square mile [349.9 housing units/km²].
From the Census of 2000: Sulphur had 8,665 Housing Units, a population of 20,512 people and a land area of 10.04 square miles [26 km²]. This gives a density of 2.37 people per Housing Unit and 863 Housing Units per square mile [333.2 housing units/km²].
NOTE: Repeating the caution above (under Population Density), be aware that when comparing Housing Units between the 2000 and the 2010 Census, there were changes in the sampling area for Sulphur 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).
Calcasieu Parish ...
The community of Sulphur is located in Calcasieu Parish.
The county had a population of 192,768 people at the 2010 Census. With it's population of 20,410 people, Sulphur represented 10.59% of the parish's total.
In addition, where the city of Sulphur has a population density of 2,042 people per square mile [788 people/km²], Calcasieu Parish averages 181.2 people per square mile [70 people/km²].
For more information, please visit our Census Page for Calcasieu Parish.
Population Rings for Sulphur ...
To help identify the number of people who live in Sulphur and the surrounding area, we have drawn concentric rings centered on Sulphur. We counted the number of communities within each ring and summed their populations.<4>
Census-to-Census Observations ...
When the Census Bureau takes a census count (or enumeration) for Sulphur, 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 Sulphur. 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.
There is only a very minor difference in the sampling area given between the 2010 Census and the 2000 Census.
The 2010 Census shows that the total area for Sulphur was 9.99 square miles [25.9 km²]. Of this total, only a minor amount of the area is covered by water.
The 2000 Census shows a total area of 10.04 square miles [26 km²]. Of this total, only a minor amount of the area is covered by water.
While generally coinciding with the GPS location (latitude/longitude) of Sulphur, the latitude and longitude given by the Census Bureau actually indicates the GPS location of the polygon for Sulphur.
For the 2010 Census, the location was given as:
Lat: 30.230538° (or 30°13'49" N) [Map]
For the 2000 Census, the location given was:
Lat: 30.230355° (or 30°13'49" N) [Map]
The difference indicates that the U.S. Census Bureau moved the location of the polygon for the 2010 Census 1,769 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 (#2405540) to Sulphur. This identifier also marks a GSP point on the map, and that point lies within the boundaries of Sulphur. The GNIS point has been mapped to the latitude/longitude:
Lat: 30.230571° (or 30°13'50" N) [Map]
The GSP location given for the 2010 Census lies 12.36 feet to the south<6> of the point given by the GNIS for Sulphur. For more information about this and the relationship of the various Federal Codes, please visit our Misc Page for Sulphur.
Miscellaneous Information for Sulphur ...
The Federal government has assigned various identifying codes to each community, county, parish and state. At one time or another, the US Census Bureau has used one (or more) of the following identifiers when referring to either Calcasieu Parish or the city of Sulphur:
The GNIS Codes ...
The current system of identification is called the Geographic Names Information System (GNIS). The following GNIS codes relate to Sulphur:
GNIS ID for Sulphur: 2405540
The FIPS Codes ...
An earlier (and largely obsolete) identification method was called the Federal Information Processing Standard (FIPS):
State Code: 22 (Louisiana)
County Code: 019 (Calcasieu Parish)
Place Code: 73640 (Sulphur)
Misc. Census Codes ...
Sulphur is located in Census Region #3 (the South Region) and Division #7 (the West 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 Sulphur, it does identify addresses that are in (or near) Sulphur. 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 Sulphur: 70663-70665<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 Sulphur.
Other Roadside Stops ...
Off-the-Road Links ...
The official website of the U.S. Census Bureau
The official website for Sulphur: www.sulphur.org/
The official website for Calcasieu Parish: www.cppj.net/
The official website for State of Louisiana: louisiana.gov/
The official website of the U.S. Board on Geographic Names (BGN)
The official website of the U.S. Geological Survey (USGS)
Please keep in mind that we can not guarantee the accuracy or timeliness of the information on this website, so use with care. We encourage you to double-check the information that is critical to you.
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This page was last modified: 13 Aug 2019