Tolland County, CT Population by Year

In 2021, the population of Tolland County was 150,293, a 0.43% increase year-by-year from 2020. Previously, in 2020, Tolland County's population was 149,650, a decline of 0.81% compared to a population of 150,865 in 2019.
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Updated Sep 18, 2023

Tolland County, CT population between 2000 and 2021

Over the last 20 plus years, between 2000 and 2021, population of Tolland County increased by 13,431. In this period, the peak population was 153,242 in the year 2010. 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 136,862 - -
2001 138,891 2,029 1.48%
2002 142,241 3,350 2.41%
2003 144,987 2,746 1.93%
2004 146,407 1,420 0.98%
2005 147,264 857 0.59%
2006 148,432 1,168 0.79%
2007 149,114 682 0.46%
2008 150,840 1,726 1.16%
2009 151,448 608 0.4%
2010 153,242 1,794 1.18%
2011 153,066 -176 -0.11%
2012 152,005 -1,061 -0.69%
2013 151,831 -174 -0.11%
2014 151,766 -65 -0.04%
2015 151,815 49 0.03%
2016 151,223 -592 -0.39%
2017 151,136 -87 -0.06%
2018 150,913 -223 -0.15%
2019 150,865 -48 -0.03%
2020 149,650 -1,215 -0.81%
2021 150,293 643 0.43%
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Tolland County, CT population from 2000 to 2021

From 2000 to 2010, Tolland County's population increased by 16,380 (11.97%), 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, Tolland County's population decreased by 3,592 (2.34%), 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 Tolland County's population from 2000 to 2021, with years on x-axis and population on y-axis
Tolland County's population from 2000 to 2021. The estimated population at the end of 2021 was 150,293. Source: U.S. Census Bureau (Population Estimates Program)

Between the year 2000 and 2021, Tolland County's population peaked in year 2010 at 153,242.

Between the year 2000 and 2021, Tolland County's population was lowest in year 2000 at 136,862.

Tolland County, CT annual population growth rate

Between the years 2000 and 2021, i.e. 21 annual cycles, the population of Tolland County grew year by year for 12 years and declined for 9 years.

From 2000 to 2021, Tolland County had an average annual population growth rate of 0.47% per year. Overall the population grew 9.81% between 2000 and 2021.

The graph shows Tolland County's annual population change from 2000 to 2021, with years on x-axis and population annual growth on y-axis
Tolland County's annual population change from 2000 to 2021. The average annual growth rate from 2000 to 2021 was 0.47% per year. In the last two years, the population declined by 572. Source: U.S. Census Bureau (Population Estimates Program)

From 2001 to 2002, Tolland County's population grew the most with an increase of 3,350 (2.41%).

While from 2019 and 2020, Tolland County's population declined the most with a negative growth of 1,215 (-0.81%).

Things to know

Is Tolland County, CT population increasing or decreasing?

According to the latest data from U.S. Census Bureau's population estimates, Tolland County's population decreased by 572 between 2019 and 2021. The decrease was 1,215 (0.81%) between 2019 and 2020; and increase of 643 (0.43%) between 2020 and 2021.

How has the population of Tolland County, CT changed in the last 10 years?

Between 2011 and 2021, population of Tolland County decreased by 1,712 (1.13%). The population was highest at 152,005 in the year 2012 and lowest at 149,650 in the year 2020. Overall the average growth rate witnessed for the last 10 years was -0.18%.

References

Datasets

Explore datasets by year of publication.
2023
Tolland County, CT 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 Tolland 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 Tolland 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 2021, the population of Tolland County was 150,293, a 0.43% increase year-by-year from 2020. Previously, in 2020, Tolland County population was 149,650, a decline of 0.81% compared to a population of 150,865 in 2019. Over the last 20 plus years, between 2000 and 2021, population of Tolland County increased by 13,431. In this period, the peak population was 153,242 in the year 2010. 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).

Tolland 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 2021

Variables / Data Columns

  • Year: This column displays the data year (Measured annually and for years 2000 to 2021)
  • Population: The population for the specific year for the Tolland County is shown in this column.
  • Year on Year Change: This column displays the change in Tolland 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 Tolland 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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