Town of Williamstown, Wisconsin
Census Data for Williamstown ...
The most recent Census Estimate<1> was for 2017 and it gives Williamstown a population of 748 people.
The last Decennial Census<2> was in 2010, giving Williamstown a population of 755 people.
The community of Williamstown is located in Dodge County. The 2010 Census gave Dodge County a population of 88,759 people. This means that Williamstown had 0.85% of the county's total population, making it Dodge's 33rd most populous community.
At the same time, Wisconsin had a population of 5,686,986 people, meaning that Williamstown had 0.01% of the total population of Wisconsin - making it the state's 1148th most populous community.
When the Census Bureau conducts a census for a community like Williamstown, 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 community.
Things like the population, area and housing for Williamstown reflect the sampling area. Since the shape of the sampling area and the actual boundaries of Williamstown 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 Williamstown has a total area of 33.45 square miles [86.6 km²]. Of this total, 31.48 square miles [81.5 km²] is land, with the balance (5.91%) being water (1.98 square miles [5.1 km²]).
Dodge County has a land area of 875 square miles [2,267.9 km²]. At 31.48 square miles [81.5 km²], Williamstown has 3.59% 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: 43° 30' 2" (or 43.5°) [Map]
Lon: -88° 35' 4" (or -88.58°)
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 (755 people) and land area (31.48 square miles [81.5 km²]) values from the 2010 Census, Williamstown had a population density of 22.57 people per square mile [8.71 people/km²].
In comparison, the 2000 Census shows Williamstown had a population of 646 people and a land area of 32.89 square miles [85.2 km²]. This gives a population density of 19.24 people per square mile [7.43 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 Williamstown. You need to be careful when making such a comparison, the differences are likely to lead to an incorrect 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, Williamstown had 290 Housing Units<3> and with its population of 755 people, this averages 2.6 people per Housing Unit.
The 2010 Census shows Williamstown had a land area of 31.48 square miles [81.5 km²]. This translates to 8.67 Housing Units per square mile [3.35 housing units/km²].
From the Census of 2000: Williamstown had 242 Housing Units, a population of 646 people and a land area of 32.89 square miles [85.2 km²]. This gives a density of 2.67 people per Housing Unit and 7.21 Housing Units per square mile [2.78 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 Williamstown and you need to be careful when comparing numbers between the censuses. More information about these differences can be found in the section called Census-to-Census Observations ... (see below).
Dodge County ...
The community of Williamstown is located in Dodge County.
The county had a population of 88,759 people at the 2010 Census. With it's population of 755 people, Williamstown represented 0.85% of the county's total.
In addition, where the community of Williamstown has a population density of 22.57 people per square mile [8.71 people/km²], Dodge County averages 101.4 people per square mile [39.14 people/km²].
For more information, please visit our Census Page for Dodge County.
Population Rings for Williamstown ...
To help identify the number of people who live in Williamstown and the surrounding area, we have drawn concentric rings centered on Williamstown. We counted the number of communities within each ring and summed their populations.<4>
| Radius ||No of|
|5 mi [8 km]||5||10,280||-3.28%|
|10 mi [16 km]||18||26,895||-2.66%|
|15 mi [24 km]||34||90,882||---|
|20 mi [32 km]||61||215,644||+0.89%|
|25 mi [40 km]||96||329,675||+0.92%|
|30 mi [48 km]||138||452,362||+1.39%|
Census-to-Census Observations ...
When the Census Bureau takes a census count (or enumeration) for Williamstown, 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 Williamstown. 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 Williamstown was 33.45 square miles [86.6 km²]. Of this total, 31.48 square miles [81.5 km²] is land, with the balance (5.91%) being water (1.98 square miles [5.1 km²]).
The 2000 Census shows a total area of 33.57 square miles [86.9 km²]. Of this total, 32.89 square miles [85.2 km²] is land, with the balance (2.02%) being water (0.68 square miles [1.7 km²]).
While generally coinciding with the GPS location (latitude/longitude) of Williamstown, the latitude and longitude given by the Census Bureau actually indicates the GPS location of the polygon for Williamstown.
For the 2010 Census, the location was given as:
Lat: 43.500597° (or 43°30'2" N) [Map]
Lon: -88.584595° (or -88°35'4" W)
For the 2000 Census, the location given was:
Lat: 43.500496° (or 43°30'1" N) [Map]
Lon: -88.569383° (or -88°34'9" W)
The difference indicates that the U.S. Census Bureau moved the location of the polygon for the 2010 Census 4,023 feet to the west<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 (#1584440) to Williamstown. This identifier also marks a GSP point on the map, and that point lies within the boundaries of Williamstown. The GNIS point has been mapped to the latitude/longitude:
Lat: 43.501938° (or 43°30'6" N) [Map]
Lon: -88.585936° (or -88°35'9" W)
The GSP location given for the 2010 Census lies 603 feet to the southeast<6> of the point given by the GNIS for Williamstown. For more information about this and the relationship of the various Federal Codes, please visit our Misc Page for Williamstown.
Miscellaneous Information for Williamstown ...
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 Dodge County or the community of Williamstown:
The GNIS Codes ...
The current system of identification is called the Geographic Names Information System (GNIS). The following GNIS codes relate to Williamstown:
GNIS ID for Williamstown: 1584440
GNIS ID for Dodge County: 1581073
GNIS ID for Wisconsin: 1779806
The FIPS Codes ...
An earlier (and largely obsolete) identification method was called the Federal Information Processing Standard (FIPS):
State Code: 55 (Wisconsin)
County Code: 027 (Dodge County)
Place Code: 87225 (Williamstown)
State & County Code: 55/027 (Wisconsin / Dodge County)
State & Place Code: 55/87225 (Wisconsin / Williamstown)
Misc. Census Codes ...
Williamstown is located in Census Region #2 (the Midwest Region) and Division #3 (the East North-Central Division).
For more information about the various Federal identification codes, please visit our Misc Page for Williamstown.
|<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 89 degrees and a distance of 4,023 feet.|
- Return to Citation
|<6>||The calculated bearing (or angle) to the GNIS point is 215 degrees and a distance of 603 feet.|
- Return to Citation
For additional information, please visit our Glossary for Williamstown.