Census Data for Sidney
Population ...
The most recent Census Estimate<1> was for 2019 and it gave Sidney a population of 20,450 people.
The last Decennial Census<2> was in 2010, which gave Sidney a population of 21,229 people.
The city of Sidney is located in Shelby County. The 2010 Census gave Shelby County; a population of 49,423 people. This means that Sidney had 42.95% of the county's total population, making it Shelby's most populous community.
At the same time, Ohio had a population of 11,536,504 people, meaning that Sidney had 0.18% of the total population of Ohio - making it the state's 76th most populous community.
Area ...
The 2010 Census shows that the sampling area for Sidney has a total area of 12.15 square miles [31.5 km²]. Of this total, 12.02 square miles [31.1 km²] is land, with the balance (1.09%) being water (0.13 square miles [0.3 km²]).
Shelby County has a land area of 407.7 square miles [1,055.9 km²]. At 12.02 square miles [31.1 km²], Sidney has 2.95% of the county's total land area.
- Continue Reading ...
- When the Census Bureau conducts a census for a city like Sidney, 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 Sidney reflect the sampling area. Since the shape of the sampling area and the actual boundaries of Sidney 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: 40° 17' 22" (or 40.29°)
- Lon: -84° 10' 0" (or -84.17°)
- 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, Sidney had 9,265 Housing Units<3> and with its population of 21,229 people, this averages 2.29 people per Housing Unit.
- Continue Reading ...
- The 2010 Census shows Sidney had a land area of 12.02 square miles [31.1 km²]. This translates to 762 Housing Units per square mile [294.3 housing units/km²].
- From the Census of 2000: Sidney had 8,557 Housing Units, a population of 20,211 people and a land area of 10.43 square miles [27 km²]. This gives a density of 2.36 people per Housing Unit and 815 Housing Units per square mile [314.8 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 Sidney and you need to be careful when comparing between the censuses. More information about these differences can be found in the section called Census-to-Census Observations ... (see below).
Shelby County ...
The community of Sidney is located in Shelby County<4> and is the County Seat for Shelby County.
The county had a population of 49,423 people at the 2010 Census. With it's population of 21,229 people, Sidney represented 42.95% of the county's total.
In addition, where the city of Sidney has a population density of 1,746 people per square mile [674 people/km²], Shelby County averages 121.2 people per square mile [46.81 people/km²].
For more information, please visit our Census Page for Shelby County.
Census-to-Census Observations ...
Introduction ...
When the Census Bureau takes a census count (or enumeration) for Sidney, 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 Sidney. 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 Sidney 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 Sidney, the latitude and longitude given by the Census Bureau actually indicates the GPS location of the polygon for Sidney.
- Continue Reading ...
- For the 2010 Census, the location was given as:
- Lat: 40.289527° (or 40°17'22" N)
- Lon: -84.166729° (or -84°10'0" W)
- For the 2000 Census, the location given was:
- Lat: 40.289683° (or 40°17'22" N)
- Lon: -84.161040° (or -84°9'39" W)
- The difference indicates that the U.S. Census Bureau moved the location of the polygon for the 2010 Census 1,583 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 (#2395881) to Sidney. This identifier also marks a GPS point on the map, and that point lies within the boundaries of Sidney. The GNIS point has been mapped to the latitude/longitude:
- Lat: 40.288840° (or 40°17'19" N)
- Lon: -84.167278° (or -84°10'2" W)
- The GPS location given for the 2010 Census lies 293.3 feet to the northeast<6> of the point given by the GNIS for Sidney. For more information about this and the relationship of the various Federal Codes, please visit our Misc Page for Sidney.
Miscellaneous Information for Sidney ...
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 Shelby County or the city of Sidney:
- The GNIS Codes ...
- The FIPS Codes ...
- An earlier (and largely obsolete) identification method was called the Federal Information Processing Standard (FIPS):
- State Code: 39 (Ohio)
- County Code: 149 (Shelby County)
- Place Code: 72424 (Sidney)
- State & County Code: 39/149 (Ohio / Shelby County)
- State & Place Code: 39/72424 (Ohio / Sidney)
- Misc. Census Codes ...
- Sidney 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 Sidney.
Off-the-Road Links ...
The official website for Sidney: www.sidneyoh.com/
The official website for Shelby County: www.co.shelby.oh.us/
The official website for State of Ohio: https://ohio.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 Ohio's counties, including Shelby, have changed over time, we recommend the Atlas of Historical County Boundaries. |
| <5> | The calculated bearing (or angle) to the 2010 Census location is 92 degrees and a distance of 1,583 feet. |
| <6> | The calculated bearing (or angle) to the GNIS point is 328 degrees and a distance of 293.3 feet. |