A Gazetteer for the United States and Canada
Town of Union, Connecticut
Census Data for Union ...
The most recent Census Estimate<1> was for 2017 and it gave Union a population of 839 people.
The last Decennial Census<2> was in 2010, which gave Union a population of 854 people.
The community of Union is located in Tolland County. The 2010 Census gave Tolland County a population of 152,691 people. This means that Union had 0.56% of the county's total population, making it Tolland's 13th most populous community.
When the Census Bureau conducts a census for a community like Union, 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 community.
Things like the population, area and housing for Union reflect the sampling area. Since the shape of the sampling area and the actual boundaries of Union 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 Union has a total area of 29.83 square miles [77.2 km²]. Of this total, 28.8 square miles [74.6 km²] is land, with the balance (3.45%) being water (1.03 square miles [2.7 km²]).
Tolland County has a land area of 410.2 square miles [1,062.4 km²]. At 28.8 square miles [74.6 km²], Union has 7.02% 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 the center of the polygon, known as the centroid). At the time of the 2010 Census, the sampling area was located at:
Lat: 42° 0' 20" (or 42.01°) [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 (854 people) and land area (28.8 square miles [74.6 km²]) values from the 2010 Census, Union had a population density of 28.63 people per square mile [11.06 people/km²].
In comparison, the 2000 Census shows Union had a population of 693 people and a land area of 28.71 square miles [74.3 km²]. This gives a population density of 23.23 people per square mile [8.97 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 Union. You need to be careful when making such a comparison, the differences are likely to lead to an apple-to-oranges comparison. More information about the nature of these differences can be found in the section Census-to-Census Observations ... (see below).
Housing Units ...
At the time of the 2010 Census, Union had 388 Housing Units<3> and with its population of 854 people, this averages 2.2 people per Housing Unit.
The 2010 Census shows Union had a land area of 28.8 square miles [74.6 km²]. This translates to 13.01 Housing Units per square mile [5.02 housing units/km²].
From the Census of 2000: Union had 332 Housing Units, a population of 693 people and a land area of 28.71 square miles [74.3 km²]. This gives a density of 2.09 people per Housing Unit and 11.13 Housing Units per square mile [4.3 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 Union and you need to be careful when comparing results between the censuses. More information about these differences can be found in the section called Census-to-Census Observations ... (see below).
Tolland County ...
The Town of Union is located in Tolland County.
The county had a population of 152,691 people at the 2010 Census. With it's population of 854 people, Union represented 0.56% of the county's total.
In addition, where the community of Union has a population density of 28.63 people per square mile [11.06 people/km²], Tolland County averages 372.2 people per square mile [143.7 people/km²].
For more information, please visit our Census Page for Tolland County.
Population Rings for Union ...
To help identify the number of people who live in Union and the surrounding area, we have drawn concentric rings centered on Union. 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 Union, 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 Union. 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 Union was 29.83 square miles [77.2 km²]. Of this total, 28.8 square miles [74.6 km²] is land, with the balance (3.45%) being water (1.03 square miles [2.7 km²]).
The 2000 Census shows a total area of 29.83 square miles [77.3 km²]. Of this total, 28.71 square miles [74.3 km²] is land, with the balance (3.76%) being water (1.12 square miles [2.9 km²]).
While generally coinciding with the GPS location (latitude/longitude) of Union, the latitude and longitude given by the Census Bureau actually indicates the GPS location of the polygon for Union.
For the 2010 Census, the location was given as:
Lat: 42.005783° (or 42°0'20" N) [Map]
For the 2000 Census, the location given was:
Lat: 41.993906° (or 41°59'38" N) [Map]
The difference indicates that the U.S. Census Bureau moved the location of the polygon for the 2010 Census 4,608 feet to the north<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 (#213519) to Union. This identifier also marks a GSP point on the map, and that point lies within the boundaries of Union. The GNIS point has been mapped to the latitude/longitude:
Lat: 41.988152° (or 41°59'17" N) [Map]
The GSP location given for the 2010 Census lies 6,475 feet to the north<6> of the point given by the GNIS for Union. For more information about this and the relationship of the various Federal Codes, please visit our Misc Page for Union.
Miscellaneous Information for Union ...
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 Tolland County or the community of Union:
The GNIS Codes ...
The current system of identification is called the Geographic Names Information System (GNIS). The following GNIS codes relate to Union:
GNIS ID for Union: 213519
The FIPS Codes ...
An earlier (and largely obsolete) identification method was called the Federal Information Processing Standard (FIPS):
State Code: 09 (Connecticut)
County Code: 013 (Tolland County)
Place Code: 77830 (Union)
Misc. Census Codes ...
Union 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 Union.
Other Roadside Stops ...
Off-the-Road Links ...
The official website of the U.S. Census Bureau
Unfortunately, we don't know of a website for Union. If you can help, please contact us through our Feedback Page.
The official website for State of Connecticut: https://portal.ct.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: 19 Jan 2019