Delaware County, PA Population by Year

In 2022, the population of Delaware County was 575,182, a 0.28% decrease year-by-year from 2021. Previously, in 2021, Delaware County's population was 576,772, an increase of 0.08% compared to a population of 576,323 in 2020.
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Updated Sep 18, 2023

Delaware County, PA population between 2000 and 2022

Over the last 20 plus years, between 2000 and 2022, population of Delaware County increased by 23,409. In this period, the peak population was 576,772 in the year 2021. 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 551,773 - -
2001 552,899 1,126 0.2%
2002 553,305 406 0.07%
2003 553,886 581 0.11%
2004 553,646 -240 -0.04%
2005 554,582 936 0.17%
2006 556,405 1,823 0.33%
2007 557,790 1,385 0.25%
2008 559,300 1,510 0.27%
2009 561,288 1,988 0.36%
2010 559,009 -2,279 -0.41%
2011 559,338 329 0.06%
2012 560,865 1,527 0.27%
2013 561,635 770 0.14%
2014 562,868 1,233 0.22%
2015 563,434 566 0.1%
2016 563,860 426 0.08%
2017 564,015 155 0.03%
2018 565,506 1,491 0.26%
2019 566,506 1,000 0.18%
2020 576,323 9,817 1.73%
2021 576,772 449 0.08%
2022 575,182 -1,590 -0.28%
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Delaware County, PA population from 2000 to 2022

From 2000 to 2010, Delaware County's population increased by 7,236 (1.31%), 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, Delaware County's population increased by 17,314 (3.10%), 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 Delaware County's population from 2000 to 2022, with years on x-axis and population on y-axis
Delaware County's population from 2000 to 2022. The estimated population at the end of 2022 was 575,182. Source: U.S. Census Bureau (Population Estimates Program)

Between the year 2000 and 2022, Delaware County's population peaked in year 2021 at 576,772.

Between the year 2000 and 2022, Delaware County's population was lowest in year 2000 at 551,773.

Delaware County, PA annual population growth rate

Between the years 2000 and 2022, i.e. 22 annual cycles, the population of Delaware County grew year by year for 19 years and declined for 3 years.

From 2000 to 2022, Delaware County had an average annual population growth rate of 0.19% per year. Overall the population grew 4.24% between 2000 and 2022.

The graph shows Delaware County's annual population change from 2000 to 2022, with years on x-axis and population annual growth on y-axis
Delaware County's annual population change from 2000 to 2022. The average annual growth rate from 2000 to 2022 was 0.19% per year. In the last two years, the population declined by 1,141. Source: U.S. Census Bureau (Population Estimates Program)

From 2019 to 2020, Delaware County's population grew the most with an increase of 9,817 (1.73%).

While from 2009 and 2010, Delaware County's population declined the most with a negative growth of 2,279 (-0.41%).

Things to know

Is Delaware County, PA population increasing or decreasing?

According to the latest data from U.S. Census Bureau's population estimates, Delaware County's population decreased by 1,141 between 2020 and 2022. The increase was 449 (0.08%) between 2020 and 2021; and decrease of 1,590 (0.28%) between 2021 and 2022.

How has the population of Delaware County, PA changed in the last 10 years?

Between 2012 and 2022, population of Delaware County increased by 13,547 (2.41%). The population was highest at 576,772 in the year 2021 and lowest at 561,635 in the year 2013. Overall the average growth rate witnessed for the last 10 years was 0.25%.

References

Datasets

Explore datasets by year of publication.
2023
Delaware County, PA 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 Delaware 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 Delaware 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 Delaware County was 575,182, a 0.28% decrease year-by-year from 2021. Previously, in 2021, Delaware County population was 576,772, an increase of 0.08% compared to a population of 576,323 in 2020. Over the last 20 plus years, between 2000 and 2022, population of Delaware County increased by 23,409. In this period, the peak population was 576,772 in the year 2021. 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).

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

About the author

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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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