Census Data for Dillon
Population ...
The most recent Census Estimate<1> was for 2019 and it gave Dillon a population of 4,314 people.
The last Decennial Census<2> was in 2010, which gave Dillon a population of 4,134 people.
The city of Dillon is located in Beaverhead County. The 2010 Census gave Beaverhead County; a population of 9,246 people. This means that Dillon had 44.71% of the county's total population, making it Beaverhead's most populous community.
At the same time, Montana had a population of 989,415 people, meaning that Dillon had 0.42% of the total population of Montana - making it the state's 21st most populous community.
Area ...
The 2010 Census shows that the sampling area for Dillon has a total area of 1.76 square miles [4.6 km²].
Beaverhead County has a land area of 5,541 square miles [14,352.7 km²]. At 1.76 square miles [4.6 km²], Dillon has 0.03% of the county's total land area.
- Continue Reading ...
- When the Census Bureau conducts a census for a city like Dillon, 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 city.
- Things like population, area and housing for Dillon reflect the sampling area. Since the shape of the sampling area and the actual boundaries of Dillon 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: 45° 13' 1" (or 45.22°)
- Lon: -112° 38' 3" (or -112.63°)
- 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, Dillon had 1,930 Housing Units<3> and with its population of 4,134 people, this averages 2.14 people per Housing Unit.
- Continue Reading ...
- The 2010 Census shows Dillon had a land area of 1.76 square miles [4.6 km²]. This translates to 1,097 Housing Units per square mile [423.9 housing units/km²].
- From the Census of 2000: Dillon had 1,831 Housing Units, a population of 3,752 people and a land area of 1.63 square miles [4.2 km²]. This gives a density of 2.05 people per Housing Unit and 1,122 Housing Units per square mile [433.5 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 Dillon and you need to be careful when comparing results 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).
Beaverhead County ...
The community of Dillon is located in Beaverhead County<4> and is the County Seat for Beaverhead County.
The county had a population of 9,246 people at the 2010 Census. With it's population of 4,134 people, Dillon represented 44.71% of the county's total.
In addition, where the city of Dillon has a population density of 2,351 people per square mile [907 people/km²], Beaverhead County averages 1.67 people per square mile [0.64 people/km²].
For more information, please visit our Census Page for Beaverhead County.
Census-to-Census Observations ...
Introduction ...
When the Census Bureau takes a census count (or enumeration) for Dillon, 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 Dillon. 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 Dillon 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 Dillon, the latitude and longitude given by the Census Bureau actually indicates the GPS location of the polygon for Dillon.
- Continue Reading ...
- For the 2010 Census, the location was given as:
- Lat: 45.217121° (or 45°13'1" N)
- Lon: -112.634273° (or -112°38'3" W)
- For the 2000 Census, the location given was:
- Lat: 45.215735° (or 45°12'56" N)
- Lon: -112.634055° (or -112°38'2" W)
- The difference indicates that the U.S. Census Bureau moved the location of the polygon for the 2010 Census 508 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 (#2410340) to Dillon. This identifier also marks a GPS point on the map, and that point lies within the boundaries of Dillon. The GNIS point has been mapped to the latitude/longitude:
- Lat: 45.216613° (or 45°12'59" N)
- Lon: -112.634810° (or -112°38'5" W)
- The GPS location given for the 2010 Census lies 230.9 feet to the northeast<6> of the point given by the GNIS for Dillon. For more information about this and the relationship of the various Federal Codes, please visit our Misc Page for Dillon.
Miscellaneous Information for Dillon ...
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 Beaverhead County or the city of Dillon:
- The GNIS Codes ...
- The FIPS Codes ...
- An earlier (and largely obsolete) identification method was called the Federal Information Processing Standard (FIPS):
- State Code: 30 (Montana)
- County Code: 001 (Beaverhead County)
- Place Code: 20800 (Dillon)
- State & County Code: 30/001 (Montana / Beaverhead County)
- State & Place Code: 30/20800 (Montana / Dillon)
- Misc. Census Codes ...
- Dillon is located in Census Region #4 (the West Region) and Division #8 (the Mountain Division).
For more information about the various Federal identification codes, please visit our Misc Page for Dillon.
Off-the-Road Links ...
Unfortunately, we don't know of a website for Dillon. If you can help, please contact us through our Feedback Page.
The official website for State of Montana: https://mt.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 Montana's counties, including Beaverhead, have changed over time, we recommend the Atlas of Historical County Boundaries. |
| <5> | The calculated bearing (or angle) to the 2010 Census location is 6 degrees and a distance of 508 feet. |
| <6> | The calculated bearing (or angle) to the GNIS point is 323 degrees and a distance of 230.9 feet. |