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Kennebec, South Dakota

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Census Data for Kennebec ...

Population ...

The most recent Census Estimate<1> was for 2019 and it gave Kennebec a population of 247 people.

The last Decennial Census<2> was in 2010, which gave Kennebec a population of 240 people.

The town of Kennebec is located in Lyman County. The 2010 Census gave Lyman County; a population of 3,755 people. This means that Kennebec had 6.39% of the county's total population, making it Lyman's 4th most populous community.

At the same time, South Dakota had a population of 814,180 people, meaning that Kennebec had 0.03% of the total population of South Dakota - making it the state's 224th most populous community.

Area ...

The 2010 Census shows that the sampling area for Kennebec has a total area of 0.85 square miles [2.2 km²].

Lyman County has a land area of 1,641 square miles [4,252.6 km²]. At 0.85 square miles [2.2 km²], Kennebec has 0.05% of the county's total land area.

  • Continue Reading ...
    • When the Census Bureau conducts a census for a town like Kennebec, 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 town.
    • Things like population, area and housing for Kennebec reflect the sampling area. Since the shape of the sampling area and the actual boundaries of Kennebec 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:   43° 54' 12"   (or 43.9°)
    • Lon:   -99° 51' 43"   (or -99.86°)
    • 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, Kennebec had 146 Housing Units<3> and with its population of 240 people, this averages 1.64 people per Housing Unit.

  • Continue Reading ...
    • The 2010 Census shows Kennebec had a land area of 0.85 square miles [2.2 km²]. This translates to 171.2 Housing Units per square mile [66.1 housing units/km²].
    • From the Census of 2000: Kennebec had 152 Housing Units, a population of 286 people and a land area of 0.85 square miles [2.2 km²]. This gives a density of 1.88 people per Housing Unit and 179.1 Housing Units per square mile [69.1 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 Kennebec and you need to be careful when comparing numbers 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).

Lyman County ...

The community of Kennebec is located in Lyman County<4> and is the County Seat for Lyman County.

The county had a population of 3,755 people at the 2010 Census. With it's population of 240 people, Kennebec represented 6.39% of the county's total.

In addition, where the town of Kennebec has a population density of 281.4 people per square mile [108.6 people/km²], Lyman County averages 2.29 people per square mile [0.88 people/km²].

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

Census-to-Census Observations ...

Introduction ...

When the Census Bureau takes a census count (or enumeration) for Kennebec, 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 Kennebec. 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 Kennebec 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 Kennebec, the latitude and longitude given by the Census Bureau actually indicates the GPS location of the polygon for Kennebec.

  • Continue Reading ...
    • For the 2010 Census, the location was given as:
    • Lat:   43.903477°   (or 43°54'12" N)
    • Lon:   -99.862001°   (or -99°51'43" W)
    • For the 2000 Census, the location given was:
    • Lat:   43.904284°   (or 43°54'15" N)
    • Lon:   -99.862801°   (or -99°51'46" W)
    • The difference indicates that the U.S. Census Bureau moved the location of the polygon for the 2010 Census 361.6 feet to the southeast<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 (#1267443) to Kennebec. This identifier also marks a GPS point on the map, and that point lies within the boundaries of Kennebec. The GNIS point has been mapped to the latitude/longitude:
    • Lat:   43.904158°   (or 43°54'14" N)
    • Lon:   -99.862894°   (or -99°51'46" W)
    • The GPS location given for the 2010 Census lies 341.6 feet to the southeast<6> of the point given by the GNIS for Kennebec. For more information about this and the relationship of the various Federal Codes, please visit our Misc Page for Kennebec.

Miscellaneous Information for Kennebec ...

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 Lyman County or the town of Kennebec:

  • The GNIS Codes ...
    • The current system of identification is called the Geographic Names Information System (GNIS). The following GNIS codes relate to Kennebec:
    • GNIS ID for Kennebec: 1267443
    • GNIS ID for Lyman County: 1265789
    • GNIS ID for State of South Dakota: 1785534
  • Misc. Census Codes ...
    • Kennebec is located in Census Region #2 (the Midwest Region) and Division #4 (the West North-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 town like Kennebec, it does identify addresses that are in (or near) Kennebec. 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 Kennebec:57544<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 Kennebec.

Other Roadside Stops ...

Search for a Community located in South Dakota

About Lyman County

About South Dakota

Off-the-Road Links ...

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

The official website for State of South Dakota:

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 South Dakota's counties, including Lyman, have changed over time, we recommend the Atlas of Historical County Boundaries.
<5>The calculated bearing (or angle) to the 2010 Census location is 215 degrees and a distance of 361.6 feet.
<6>The calculated bearing (or angle) to the GNIS point is 223 degrees and a distance of 341.6 feet.
<7>When looking for a ZIP Code, whether Kennebec or elsewhere, it's always best to check the website of the United States Postal Service (USPS).






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This page was last modified: 27 Sep 2020