Census Data for Clear Lake
Population ...
The most recent Census Estimate<1> was for 2019 and it gave Clear Lake a population of 221 people.
The last Decennial Census<2> was in 2010, which gave Clear Lake a population of 229 people.
The village of Clear Lake is located in Sangamon County. The 2010 Census gave Sangamon County; a population of 197,465 people. This means that Clear Lake had 0.12% of the county's total population, making it Sangamon's 23rd most populous community.
At the same time, Illinois had a population of 12,830,632 people.
Area ...
The 2010 Census shows that the sampling area for Clear Lake has a total area of 0.11 square miles [0.3 km²].
Sangamon County has a land area of 868 square miles [2,248.9 km²]. At 0.11 square miles [0.3 km²], Clear Lake has 0.01% of the county's total land area.
- Continue Reading ...
- When the Census Bureau conducts a census for a village like Clear Lake, they draw a boundary around the area in which they are going to conduct their count - this defines the sampling area (usually 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 village.
- Things like population, area and housing for Clear Lake reflect the sampling area. Since the shape of the sampling area and the actual boundaries of Clear Lake might be different, it's best to check with the U.S. Census Bureau to resolve any difference between the two.
- 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: 39° 48' 49" (or 39.81°)
- Lon: -89° 34' 5" (or -89.57°)
- 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).
Housing Units ...
At the time of the 2010 Census, Clear Lake had 101 Housing Units<3> and with its population of 229 people, this averages 2.27 people per Housing Unit.
- Continue Reading ...
- The 2010 Census shows Clear Lake had a land area of 0.11 square miles [0.3 km²]. This translates to 943 Housing Units per square mile [364.5 housing units/km²].
- From the Census of 2000: Clear Lake had 111 Housing Units, a population of 267 people and a land area of 0.09 square miles [0.2 km²]. This gives a density of 2.41 people per Housing Unit and 1,193 Housing Units per square mile [461 housing units/km²].
- Note: Repeating the caution above (under Population Density), be aware that when comparing Housing Units between the 2010 Census and the 2000 Census, there were changes in the sampling area for Clear Lake and you need to be careful when comparing values 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).
Sangamon County ...
The community of Clear Lake is located in Sangamon County<4>.
The county had a population of 197,465 people at the 2010 Census. With it's population of 229 people, Clear Lake represented 0.12% of the county's total.
In addition, where the village of Clear Lake has a population density of 2,140 people per square mile [826 people/km²], Sangamon County averages 227.4 people per square mile [87.8 people/km²].
For more information, please visit our Census Page for Sangamon County.
Census-to-Census Observations ...
Introduction ...
When the Census Bureau takes a census count (or enumeration) for Clear Lake, 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 Clear Lake. It's important to note that from one Census to the next, the shape and location of the polygon can change.
- Continue Reading ...
- Although we don't have specific information about the shape of the polygon for Clear Lake or how it changed has over time, there is some information that can give us some hints. For example, since the shape of the sampling area is directly related to the shape of the polygon, any change to area probably indicates a new shape for the polygon.
- If you need precision or details about the methodology of the Census, you should visit the U.S. Census Bureau for a definitive answer.
Location ...
While generally coinciding with the GPS location (latitude/longitude) of Clear Lake, the latitude and longitude given by the Census Bureau actually indicates the GPS location of the polygon for Clear Lake.
- Continue Reading ...
- For the 2010 Census, the location was given as:
- Lat: 39.813808° (or 39°48'49" N)
- Lon: -89.568328° (or -89°34'5" W)
- For the 2000 Census, the location given was:
- Lat: 39.814177° (or 39°48'51" N)
- Lon: -89.566965° (or -89°34'1" W)
- The difference indicates that the U.S. Census Bureau moved the location of the polygon for the 2010 Census 404.7 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 (#2397642) to Clear Lake. This identifier also marks a GPS point on the map, and that point lies within the boundaries of Clear Lake. The GNIS point has been mapped to the latitude/longitude:
- Lat: 39.813920° (or 39°48'50" N)
- Lon: -89.568211° (or -89°34'5" W)
- The GPS location given for the 2010 Census lies 52.4 feet to the southwest<6> of the point given by the GNIS for Clear Lake. For more information about this and the relationship of the various Federal Codes, please visit our Misc Page for Clear Lake.
Miscellaneous Information for Clear Lake ...
The Federal government has assigned various identifying codes to each community, county and state. At one time or another, the US Census Bureau has used one (or more) of the following identifiers when referring to either Sangamon County or the village of Clear Lake:
- The GNIS Codes ...
- The FIPS Codes ...
- An earlier (and largely obsolete) identification method was called the Federal Information Processing Standard (FIPS):
- State Code: 17 (Illinois)
- County Code: 167 (Sangamon County)
- Place Code: 14845 (Clear Lake)
- State & County Code: 17/167 (Illinois / Sangamon County)
- State & Place Code: 17/14845 (Illinois / Clear Lake)
- Misc. Census Codes ...
- Clear Lake 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 Clear Lake.
Off-the-Road Links ...
Unfortunately, we don't know of a website for Clear Lake. If you can help, please contact us through our Feedback Page.
The official website for Sangamon County: www.co.sangamon.il.us/
The official website for State of Illinois: https://illinois.gov
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)
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 2019. |
| <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. |
| <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). |
| <4> | If you're interested in how the shape of Illinois' counties, including Sangamon, have changed over time, we recommend the Atlas of Historical County Boundaries. |
| <5> | The calculated bearing (or angle) to the 2010 Census location is 109 degrees and a distance of 404.7 feet. |
| <6> | The calculated bearing (or angle) to the GNIS point is 141 degrees and a distance of 52.4 feet. |