O'Fallon, IL Population by Year

In 2022, the population of O'Fallon was 32,140, a 0.46% decrease year-by-year from 2021. Previously, in 2021, O'Fallon's population was 32,290, a decline of 0.04% compared to a population of 32,303 in 2020.
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Updated Sep 18, 2023

O'Fallon, IL population between 2000 and 2022

Over the last 20 plus years, between 2000 and 2022, population of O'Fallon increased by 10,068. In this period, the peak population was 32,303 in the year 2020. The numbers suggest that the population has already reached its peak and is showing a trend of decline.

Year Population Year on Year Change Change in Percent
2000 22,072 - -
2001 22,421 349 1.58%
2002 22,942 521 2.32%
2003 23,765 823 3.59%
2004 24,291 526 2.21%
2005 24,757 466 1.92%
2006 25,444 687 2.77%
2007 25,892 448 1.76%
2008 26,189 297 1.15%
2009 26,454 265 1.01%
2010 28,806 2,352 8.89%
2011 29,423 617 2.14%
2012 29,328 -95 -0.32%
2013 29,224 -104 -0.35%
2014 29,151 -73 -0.25%
2015 29,124 -27 -0.09%
2016 29,199 75 0.26%
2017 29,364 165 0.57%
2018 29,602 238 0.81%
2019 29,621 19 0.06%
2020 32,303 2,682 9.05%
2021 32,290 -13 -0.04%
2022 32,140 -150 -0.46%
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O'Fallon, IL population from 2000 to 2022

From 2000 to 2010, O'Fallon's population increased by 6,734 (30.51%), according to Census Bureau's Population Estimates Program. For the same period, the rate of growth for the United States was 9.63%.

From 2010 to 2020, O'Fallon's population increased by 3,497 (12.14%), according to Census Bureau's Population Estimates Program. For the same period, the rate of growth for the United States was 7.17%.

The graph shows O'Fallon's population from 2000 to 2022, with years on x-axis and population on y-axis
O'Fallon's population from 2000 to 2022. The estimated population at the end of 2022 was 32,140. Source: U.S. Census Bureau (Population Estimates Program)

Between the year 2000 and 2022, O'Fallon's population peaked in year 2020 at 32,303.

Between the year 2000 and 2022, O'Fallon's population was lowest in year 2000 at 22,072.

O'Fallon, IL annual population growth rate

Between the years 2000 and 2022, i.e. 22 annual cycles, the population of O'Fallon grew year by year for 16 years and declined for 6 years.

From 2000 to 2022, O'Fallon had an average annual population growth rate of 2.07% per year. Overall the population grew 45.61% between 2000 and 2022.

The graph shows O'Fallon's annual population change from 2000 to 2022, with years on x-axis and population annual growth on y-axis
O'Fallon's annual population change from 2000 to 2022. The average annual growth rate from 2000 to 2022 was 2.07% per year. In the last two years, the population declined by 163. Source: U.S. Census Bureau (Population Estimates Program)

From 2019 to 2020, O'Fallon's population grew the most with an increase of 2,682 (9.05%).

While from 2021 and 2022, O'Fallon's population declined the most with a negative growth of 150 (-0.46%).

Things to know

Is O'Fallon, IL population increasing or decreasing?

According to the latest data from U.S. Census Bureau's population estimates, O'Fallon's population decreased by 163 between 2020 and 2022. The decrease was 13 (0.04%) between 2020 and 2021; and decrease of 150 (0.46%) between 2021 and 2022.

How has the population of O'Fallon, IL changed in the last 10 years?

Between 2012 and 2022, population of O'Fallon increased by 2,916 (9.98%). The population was highest at 32,303 in the year 2020 and lowest at 29,124 in the year 2015. Overall the average growth rate witnessed for the last 10 years was 0.95%.

References

Datasets

Explore datasets by year of publication.
2023
O'Fallon, IL Population Dataset: Yearly Figures, Population Change, and Percent Change Analysis
Last updated September 18, 2023
ACS
Free
Neilsberg
CSV, JSON
2017-2021
CC BY 4.0
About this dataset

Context

The dataset tabulates the O'Fallon population over the last 20 plus years. It lists the population for each year, along with the year on year change in population, as well as the change in percentage terms for each year. The dataset can be utilized to understand the population change of O'Fallon across the last two decades. For example, using this dataset, we can identify if the population is declining or increasing. If there is a change, when the population peaked, or if it is still growing and has not reached its peak. We can also compare the trend with the overall trend of United States population over the same period of time.

Key observations

In 2022, the population of O'Fallon was 32,140, a 0.46% decrease year-by-year from 2021. Previously, in 2021, O'Fallon population was 32,290, a decline of 0.04% compared to a population of 32,303 in 2020. Over the last 20 plus years, between 2000 and 2022, population of O'Fallon increased by 10,068. In this period, the peak population was 32,303 in the year 2020. The numbers suggest that the population has already reached its peak and is showing a trend of decline. Source: U.S. Census Bureau Population Estimates Program (PEP).

O'Fallon population by year

Content

When available, the data consists of estimates from the U.S. Census Bureau Population Estimates Program (PEP).

Data Coverage:

  • From 2000 to 2022

Variables / Data Columns

  • Year: This column displays the data year (Measured annually and for years 2000 to 2022)
  • Population: The population for the specific year for the O'Fallon is shown in this column.
  • Year on Year Change: This column displays the change in O'Fallon population for each year compared to the previous year.
  • Change in Percent: This column displays the year on year change as a percentage. Please note that the sum of all percentages may not equal one due to rounding of values.

Good to know

Margin of Error

Data in the dataset are based on the estimates and are subject to sampling variability and thus a margin of error. Neilsberg Research recommends using caution when presening these estimates in your research.

Custom data

If you do need custom data for any of your research project, report or presentation, you can contact our research staff at research@neilsberg.com for a feasibility of a custom tabulation on a fee-for-service basis.

Inspiration

Neilsberg Research Team curates, analyze and publishes demographics and economic data from a variety of public and proprietary sources, each of which often includes multiple surveys and programs. The large majority of Neilsberg Research aggregated datasets and insights is made available for free download at https://www.neilsberg.com/research/.

Recommended for further research

This dataset is a part of the main dataset for O'Fallon Population by Year. You can refer the same here

If you're looking for datasets from another year, please feel free to contact us at research@neilsberg.com and we'll be happy to assist you further.

About the author

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Neilsberg Research
Neilsberg Research team are data scientists with expertise in processing, analysis and visualization of big data helping small businesses make right decisions.

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