Census Data for Fairfield
Population ...
The most recent Census Estimate<1> was for 2019 and it gave Fairfield a population of 42,620 people.
The last Decennial Census<2> was in 2010, which gave Fairfield a population of 42,510 people.
The city of Fairfield is located in Hamilton County. The 2010 Census gave Hamilton County; a population of 802,374 people. This means that Fairfield had 5.3% of the county's total population, making it Hamilton's 3rd most populous community.
At the same time, Ohio had a population of 11,536,504 people, meaning that Fairfield had 0.37% of the total population of Ohio - making it the state's 25th most populous community.
Hamilton County ...
The community of Fairfield is primarily located in Hamilton County<3>. A portion of Fairfield extends into Butler County.
The county had a population of 802,374 people at the 2010 Census. With it's population of 42,510 people, Fairfield represented 5.3% of the county's total.
For more information, please visit our Census Page for Hamilton County.
Census-to-Census Observations ...
Introduction ...
When the Census Bureau takes a census count (or enumeration) for Fairfield, 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 Fairfield. 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 Fairfield or how it changed has over time, there is some information that can give us some hints.
- If you need precision or details about the methodology of the Census, you should visit the U.S. Census Bureau for a definitive answer.
Area ...
The area (or polygon) given for the 2010 Census matches that given for the 2000 Census. It's likely that the same polygon was used for the two censuses.
Location ...
While generally coinciding with the GPS location (latitude/longitude) of Fairfield, the latitude and longitude given by the Census Bureau actually indicates the GPS location of the polygon for Fairfield.
- Continue Reading ...
- For the 2010 Census, the location was given as:
- Lat: 39.331420° (or 39°19'53" N)
- Lon: -84.542716° (or -84°32'33" W)
- For the 2000 Census, the location given was:
- Lat: 39.331156° (or 39°19'52" N)
- Lon: -84.542842° (or -84°32'34" W)
- The difference indicates that the U.S. Census Bureau moved the location of the polygon for the 2010 Census 102.6 feet to the north<4> 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 (#1085670) to Fairfield. This identifier also marks a GPS point on the map, and that point lies within the boundaries of Fairfield. The GNIS point has been mapped to the latitude/longitude:
- Lat: 39.330175° (or 39°19'48" N)
- Lon: -84.540269° (or -84°32'24" W)
- The GPS location given for the 2010 Census lies 825 feet to the northwest<5> of the point given by the GNIS for Fairfield. For more information about this and the relationship of the various Federal Codes, please visit our Misc Page for Fairfield.
Miscellaneous Information for Fairfield ...
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 Hamilton County or the city of Fairfield:
- 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: 061 (Hamilton County)
- Place Code: 25970 (Fairfield)
- State & County Code: 39/061 (Ohio / Hamilton County)
- State & Place Code: 39/25970 (Ohio / Fairfield)
- Misc. Census Codes ...
- Fairfield 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 Fairfield.
Off-the-Road Links ...
The official website for Fairfield: www.fairfield-city.org/
The official website for Hamilton County: www.hamilton-co.org/
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> | If you're interested in how the shape of Ohio's counties, including Hamilton, have changed over time, we recommend the Atlas of Historical County Boundaries. |
| <4> | The calculated bearing (or angle) to the 2010 Census location is 339 degrees and a distance of 102.6 feet. |
| <5> | The calculated bearing (or angle) to the GNIS point is 56 degrees and a distance of 825 feet. |