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Census Data for Underhill

Population ...

The most recent Census Estimate<1> was for 2019 and it gave Underhill a population of 3,087 people.

The last Decennial Census<2> was in 2010, which gave Underhill a population of 3,016 people.

The community of Underhill is located in Chittenden County. The 2010 Census gave Chittenden County; a population of 156,545 people. This means that Underhill had 1.93% of the county's total population, making it Chittenden's 14th most populous community.

At the same time, Vermont had a population of 625,741 people, meaning that Underhill had 0.48% of the total population of Vermont - making it the state's 57th most populous community.

Area ...

The 2010 Census shows that the sampling area for Underhill has a total area of 51.4 square miles [133.1 km²]. Of this total, a small amount of the area is covered by water (0.07 square miles [0.2 km²]).

Chittenden County has a land area of 536 square miles [1,389.7 km²]. At 51.3 square miles [132.9 km²], Underhill has 9.57% of the county's total land area.

  • Continue Reading ...
    • When the Census Bureau conducts a census for a community like Underhill, 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 community.
    • Things like population, area and housing for Underhill reflect the sampling area. Since the shape of the sampling area and the actual boundaries of Underhill 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:   44° 32' 32"   (or 44.54°)
    • Lon:   -72° 52' 59"   (or -72.88°)
    • 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, Underhill had 1,199 Housing Units<3> and with its population of 3,016 people, this averages 2.52 people per Housing Unit.

  • Continue Reading ...
    • The 2010 Census shows Underhill had a land area of 51.3 square miles [132.9 km²]. This translates to 23.33 Housing Units per square mile [9.01 housing units/km²].
    • From the Census of 2000: Underhill had 1,088 Housing Units, a population of 2,980 people and a land area of 51.4 square miles [133 km²]. This gives a density of 2.74 people per Housing Unit and 21.17 Housing Units per square mile [8.17 housing units/km²].
    • Note: Repeating the caution above (under Population Density), be aware that when comparing Housing Units between the 2010 and the 2000 Census, there were changes in the sampling area for Underhill and you need to be careful when comparing values between the censuses. More information about these differences can be found in the section called Census-to-Census Observations ... (see below).

Chittenden County ...

The community of Underhill is located in Chittenden County<4>.

The county had a population of 156,545 people at the 2010 Census. With it's population of 3,016 people, Underhill represented 1.93% of the county's total.

In addition, where the community of Underhill has a population density of 58.7 people per square mile [22.65 people/km²], Chittenden County averages 291.7 people per square mile [112.6 people/km²].

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

Census-to-Census Observations ...

Introduction ...

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

  • Continue Reading ...
    • For the 2010 Census, the location was given as:
    • Lat:   44.542367°   (or 44°32'32" N)
    • Lon:   -72.883226°   (or -72°52'59" W)
    • For the 2000 Census, the location given was:
    • Lat:   44.535945°   (or 44°32'9" N)
    • Lon:   -72.923797°   (or -72°55'25" W)
    • The difference indicates that the U.S. Census Bureau moved the location of the polygon for the 2010 Census 2 miles 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 (#1462232) to Underhill. This identifier also marks a GPS point on the map, and that point lies within the boundaries of Underhill. The GNIS point has been mapped to the latitude/longitude:
    • Lat:   44.530329°   (or 44°31'49" N)
    • Lon:   -72.882070°   (or -72°52'55" W)
    • The GPS location given for the 2010 Census lies 4,399 feet to the north<6> of the point given by the GNIS for Underhill. For more information about this and the relationship of the various Federal Codes, please visit our Misc Page for Underhill.

Miscellaneous Information for Underhill ...

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 Chittenden County or the community of Underhill:

  • The GNIS Codes ...
    • The current system of identification is called the Geographic Names Information System (GNIS). The following GNIS codes relate to Underhill:
    • GNIS ID for Underhill: 1462232
    • GNIS ID for Chittenden County: 1461760
    • GNIS ID for State of Vermont: 1779802
  • Misc. Census Codes ...
    • Underhill is located in Census Region #1 (the Northeast Region) and Division #1 (the New England Division).

For more information about the various Federal identification codes, please visit our Misc Page for Underhill.

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

The official website for State of Vermont:

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 Vermont's counties, including Chittenden, have changed over time, we recommend the Atlas of Historical County Boundaries.
<5>The calculated bearing (or angle) to the 2010 Census location is 282 degrees and a distance of 2 miles.
<6>The calculated bearing (or angle) to the GNIS point is 3 degrees and a distance of 4,399 feet.


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This page was last modified/updated: 07 Apr 2024