Williamson County, IL Population by Year

In 2022, the population of Williamson County was 66,695, a 0.37% decrease year-by-year from 2021. Previously, in 2021, Williamson County's population was 66,943, a decline of 0.25% compared to a population of 67,113 in 2020.
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Updated Sep 18, 2023

Williamson County, IL population between 2000 and 2022

Over the last 20 plus years, between 2000 and 2022, population of Williamson County increased by 5,415. In this period, the peak population was 67,504 in the year 2016. 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 61,280 - -
2001 61,799 519 0.85%
2002 62,178 379 0.61%
2003 62,469 291 0.47%
2004 63,231 762 1.22%
2005 63,710 479 0.76%
2006 63,657 -53 -0.08%
2007 64,331 674 1.06%
2008 64,691 360 0.56%
2009 65,131 440 0.68%
2010 66,440 1,309 2.01%
2011 66,745 305 0.46%
2012 66,793 48 0.07%
2013 67,472 679 1.02%
2014 67,439 -33 -0.05%
2015 67,457 18 0.03%
2016 67,504 47 0.07%
2017 67,076 -428 -0.63%
2018 67,017 -59 -0.09%
2019 66,633 -384 -0.57%
2020 67,113 480 0.72%
2021 66,943 -170 -0.25%
2022 66,695 -248 -0.37%
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Williamson County, IL population from 2000 to 2022

From 2000 to 2010, Williamson County's population increased by 5,160 (8.42%), 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, Williamson County's population increased by 673 (1.01%), 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 Williamson County's population from 2000 to 2022, with years on x-axis and population on y-axis
Williamson County's population from 2000 to 2022. The estimated population at the end of 2022 was 66,695. Source: U.S. Census Bureau (Population Estimates Program)

Between the year 2000 and 2022, Williamson County's population peaked in year 2016 at 67,504.

Between the year 2000 and 2022, Williamson County's population was lowest in year 2000 at 61,280.

Williamson County, IL annual population growth rate

Between the years 2000 and 2022, i.e. 22 annual cycles, the population of Williamson County grew year by year for 15 years and declined for 7 years.

From 2000 to 2022, Williamson County had an average annual population growth rate of 0.40% per year. Overall the population grew 8.84% between 2000 and 2022.

The graph shows Williamson County's annual population change from 2000 to 2022, with years on x-axis and population annual growth on y-axis
Williamson County's annual population change from 2000 to 2022. The average annual growth rate from 2000 to 2022 was 0.40% per year. In the last two years, the population declined by 418. Source: U.S. Census Bureau (Population Estimates Program)

From 2009 to 2010, Williamson County's population grew the most with an increase of 1,309 (2.01%).

While from 2016 and 2017, Williamson County's population declined the most with a negative growth of 428 (-0.63%).

Things to know

Is Williamson County, IL population increasing or decreasing?

According to the latest data from U.S. Census Bureau's population estimates, Williamson County's population decreased by 418 between 2020 and 2022. The decrease was 170 (0.25%) between 2020 and 2021; and decrease of 248 (0.37%) between 2021 and 2022.

How has the population of Williamson County, IL changed in the last 10 years?

Between 2012 and 2022, population of Williamson County decreased by 777 (1.15%). The population was highest at 67,504 in the year 2016 and lowest at 66,633 in the year 2019. Overall the average growth rate witnessed for the last 10 years was -0.01%.

References

Datasets

Explore datasets by year of publication.
2023
Williamson County, 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 Williamson County 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 Williamson County 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 Williamson County was 66,695, a 0.37% decrease year-by-year from 2021. Previously, in 2021, Williamson County population was 66,943, a decline of 0.25% compared to a population of 67,113 in 2020. Over the last 20 plus years, between 2000 and 2022, population of Williamson County increased by 5,415. In this period, the peak population was 67,504 in the year 2016. 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).

Williamson County 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 Williamson County is shown in this column.
  • Year on Year Change: This column displays the change in Williamson County 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 Williamson County 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.

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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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