Ada County, ID Population by Year

In 2022, the population of Ada County was 518,907, a 1.17% increase year-by-year from 2021. Previously, in 2021, Ada County's population was 512,914, an increase of 2.94% compared to a population of 498,260 in 2020.
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Updated Sep 18, 2023

Ada County, ID population between 2000 and 2022

Over the last 20 plus years, between 2000 and 2022, population of Ada County increased by 215,582. In this period, the peak population was 518,907 in the year 2022. The numbers suggest that the population has not reached its peak yet and is showing a trend of further growth.

Year Population Year on Year Change Change in Percent
2000 303,325 - -
2001 313,765 10,440 3.44%
2002 321,300 7,535 2.4%
2003 326,859 5,559 1.73%
2004 334,128 7,269 2.22%
2005 347,657 13,529 4.05%
2006 362,034 14,377 4.14%
2007 373,541 11,507 3.18%
2008 380,400 6,859 1.84%
2009 385,955 5,555 1.46%
2010 393,369 7,414 1.92%
2011 401,352 7,983 2.03%
2012 409,032 7,680 1.91%
2013 416,180 7,148 1.75%
2014 425,774 9,594 2.31%
2015 433,254 7,480 1.76%
2016 444,929 11,675 2.69%
2017 456,994 12,065 2.71%
2018 469,161 12,167 2.66%
2019 481,880 12,719 2.71%
2020 498,260 16,380 3.4%
2021 512,914 14,654 2.94%
2022 518,907 5,993 1.17%
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Ada County, ID population from 2000 to 2022

From 2000 to 2010, Ada County's population increased by 90,044 (29.69%), 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, Ada County's population increased by 104,891 (26.66%), 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 Ada County's population from 2000 to 2022, with years on x-axis and population on y-axis
Ada County's population from 2000 to 2022. The estimated population at the end of 2022 was 518,907. Source: U.S. Census Bureau (Population Estimates Program)

Between the year 2000 and 2022, Ada County's population peaked in year 2022 at 518,907.

Between the year 2000 and 2022, Ada County's population was lowest in year 2000 at 303,325.

Ada County, ID annual population growth rate

Between the years 2000 and 2022, i.e. 22 annual cycles, the population of Ada County grew year by year for 22 years and declined for 0 years.

From 2000 to 2022, Ada County had an average annual population growth rate of 3.23% per year. Overall the population grew 71.07% between 2000 and 2022.

The graph shows Ada County's annual population change from 2000 to 2022, with years on x-axis and population annual growth on y-axis
Ada County's annual population change from 2000 to 2022. The average annual growth rate from 2000 to 2022 was 3.23% per year. In the last two years, the population grew by 20,647. Source: U.S. Census Bureau (Population Estimates Program)

From 2019 to 2020, Ada County's population grew the most with an increase of 16,380 (3.40%).

While from 2008 and 2009, Ada County's population grew the least with a growth of 5,555 (1.46%).

Things to know

Is Ada County, ID population increasing or decreasing?

According to the latest data from U.S. Census Bureau's population estimates, Ada County's population increased by 20,647 between 2020 and 2022. The increase was 14,654 (2.94%) between 2020 and 2021; and increase of 5,993 (1.17%) between 2021 and 2022.

How has the population of Ada County, ID changed in the last 10 years?

Between 2012 and 2022, population of Ada County increased by 102,727 (24.68%). The population was highest at 518,907 in the year 2022 and lowest at 416,180 in the year 2013. Overall the average growth rate witnessed for the last 10 years was 2.41%.

References

Datasets

Explore datasets by year of publication.
2023
Ada County, ID 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 Ada 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 Ada 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 Ada County was 518,907, a 1.17% increase year-by-year from 2021. Previously, in 2021, Ada County population was 512,914, an increase of 2.94% compared to a population of 498,260 in 2020. Over the last 20 plus years, between 2000 and 2022, population of Ada County increased by 215,582. In this period, the peak population was 518,907 in the year 2022. The numbers suggest that the population has not reached its peak yet and is showing a trend of further growth. Source: U.S. Census Bureau Population Estimates Program (PEP).

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