Census Data for Columbus City
Population ...
The most recent Census Estimate<1> was for 2019 and it gave Columbus City a population of 374 people.
The last Decennial Census<2> was in 2010, which gave Columbus City a population of 391 people.
The city of Columbus City is located in Louisa County. The 2010 Census gave Louisa County; a population of 11,387 people. This means that Columbus City had 3.43% of the county's total population, making it Louisa's 5th most populous community.
At the same time, Iowa had a population of 3,046,355 people, meaning that Columbus City had 0.01% of the total population of Iowa - making it the state's 516th most populous community.
Area ...
The 2010 Census shows that the sampling area for Columbus City has a total area of 0.24 square miles [0.6 km²].
Louisa County has a land area of 401.8 square miles [1,040.6 km²]. At 0.24 square miles [0.6 km²], Columbus City has 0.06% of the county's total land area.
- Continue Reading ...
- When the Census Bureau conducts a census for a city like Columbus City, 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 Columbus City reflect the sampling area. Since the shape of the sampling area and the actual boundaries of Columbus City 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: 41° 15' 33" (or 41.26°)
- Lon: -91° 22' 28" (or -91.37°)
- 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, Columbus City had 155 Housing Units<3> and with its population of 391 people, this averages 2.52 people per Housing Unit.
- Continue Reading ...
- The 2010 Census shows Columbus City had a land area of 0.24 square miles [0.6 km²]. This translates to 648 Housing Units per square mile [250.4 housing units/km²].
- From the Census of 2000: Columbus City had 138 Housing Units, a population of 376 people and a land area of 0.23 square miles [0.6 km²]. This gives a density of 2.72 people per Housing Unit and 592 Housing Units per square mile [228.6 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 Columbus City 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).
Louisa County ...
The community of Columbus City is located in Louisa County<4>.
The county had a population of 11,387 people at the 2010 Census. With it's population of 391 people, Columbus City represented 3.43% of the county's total.
In addition, where the city of Columbus City has a population density of 1,635 people per square mile [631 people/km²], Louisa County averages 28.34 people per square mile [10.94 people/km²].
For more information, please visit our Census Page for Louisa County.
Census-to-Census Observations ...
Introduction ...
When the Census Bureau takes a census count (or enumeration) for Columbus City, 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 Columbus City. 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 Columbus City 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 Columbus City, the latitude and longitude given by the Census Bureau actually indicates the GPS location of the polygon for Columbus City.
- Continue Reading ...
- For the 2010 Census, the location was given as:
- Lat: 41.259277° (or 41°15'33" N)
- Lon: -91.374690° (or -91°22'28" W)
- For the 2000 Census, the location given was:
- Lat: 41.258225° (or 41°15'29" N)
- Lon: -91.375711° (or -91°22'32" W)
- The difference indicates that the U.S. Census Bureau moved the location of the polygon for the 2010 Census 474.8 feet to the northeast<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 (#2393611) to Columbus City. This identifier also marks a GPS point on the map, and that point lies within the boundaries of Columbus City. The GNIS point has been mapped to the latitude/longitude:
- Lat: 41.259248° (or 41°15'33" N)
- Lon: -91.374864° (or -91°22'29" W)
- The GPS location given for the 2010 Census lies 48.85 feet to the east<6> of the point given by the GNIS for Columbus City. For more information about this and the relationship of the various Federal Codes, please visit our Misc Page for Columbus City.
Miscellaneous Information for Columbus City ...
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 Louisa County or the city of Columbus City:
- The GNIS Codes ...
- The FIPS Codes ...
- An earlier (and largely obsolete) identification method was called the Federal Information Processing Standard (FIPS):
- State Code: 19 (Iowa)
- County Code: 115 (Louisa County)
- Place Code: 15375 (Columbus City)
- State & County Code: 19/115 (Iowa / Louisa County)
- State & Place Code: 19/15375 (Iowa / Columbus City)
- Misc. Census Codes ...
- Columbus City 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 city like Columbus City, it does identify addresses that are in (or near) Columbus City. 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 Columbus City:52737<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 Columbus City.
Off-the-Road Links ...
Unfortunately, we don't know of a website for Columbus City. If you can help, please contact us through our Feedback Page.
The official website for Louisa County: www.louisacountyiowa.org/
The official website for State of Iowa: https://www.iowa.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 Iowa's counties, including Louisa, have changed over time, we recommend the Atlas of Historical County Boundaries. |
| <5> | The calculated bearing (or angle) to the 2010 Census location is 323 degrees and a distance of 474.8 feet. |
| <6> | The calculated bearing (or angle) to the GNIS point is 282 degrees and a distance of 48.85 feet. |
| <7> | When looking for a ZIP Code, whether Columbus City or elsewhere, it's always best to check the website of the United States Postal Service (USPS). |