Data / Rankings / Natural change, July to June / Counties in Connecticut

Counties in Connecticut by natural change, July to June

Western Connecticut Planning Region had the highest natural change, July to June of 9 counties in 2021, at 1,130. Southeastern Connecticut Planning Region had the lowest, at -617. The median was -311 and the figure for Connecticut was -674. Source: the U.S. Census Bureau.

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Highest1,130Western Connecticut Planning Region
Lowest-617Southeastern Connecticut Planning Region
Median-3119 counties
Connecticut-674History

Map of counties, 2021

Capitol Planning Region: -332 personsGreater Bridgeport Planning Region: 720 personsLower Connecticut River Valley Planning Region: -419 personsNaugatuck Valley Planning Region: -213 personsNortheastern Connecticut Planning Region: -279 personsNorthwest Hills Planning Region: -353 personsSouth Central Connecticut Planning Region: -311 personsSoutheastern Connecticut Planning Region: -617 personsWestern Connecticut Planning Region: 1,130 persons
  • Under -350
  • -350 to -310
  • -310 to 0
  • 0 to 930
  • 930 and over
persons, 2021. Red areas are below zero and blue areas above it. Source: U.S. Census Bureau, Population Estimates Program: natural change (births minus deaths), July 1 of the previous year to June 30 of the reported year; vintage 2020 files for 2011 to 2020 and the latest 2020s vintage from 2021. Boundaries: U.S. Census Bureau cartographic boundary files.

All counties, 2021

Western Connecticut Planning Region: 1,130 personsWestern Connecticut Planning Regi…1,130Greater Bridgeport Planning Region: 720 personsGreater Bridgeport Planning Region720Naugatuck Valley Planning Region: -213 personsNaugatuck Valley Planning Region-213Northeastern Connecticut Planning Region: -279 personsNortheastern Connecticut Planning…-279South Central Connecticut Planning Region: -311 personsSouth Central Connecticut Plannin…-311Capitol Planning Region: -332 personsCapitol Planning Region-332Northwest Hills Planning Region: -353 personsNorthwest Hills Planning Region-353Lower Connecticut River Valley Planning Region: -419 personsLower Connecticut River Valley Pl…-419Southeastern Connecticut Planning Region: -617 personsSoutheastern Connecticut Planning…-617Western Connecticut Planning Region: 1,130 personsWestern Connecticut Planning Region1,130Greater Bridgeport Planning Region: 720 personsGreater Bridgeport Planning Region720Naugatuck Valley Planning Region: -213 personsNaugatuck Valley Planning Region-213Northeastern Connecticut Planning Region: -279 personsNortheastern Connecticut Planning Region-279South Central Connecticut Planning Region: -311 personsSouth Central Connecticut Planning Region-311Capitol Planning Region: -332 personsCapitol Planning Region-332Northwest Hills Planning Region: -353 personsNorthwest Hills Planning Region-353Lower Connecticut River Valley Planning Region: -419 personsLower Connecticut River Valley Planning Region-419Southeastern Connecticut Planning Region: -617 personsSoutheastern Connecticut Planning Region-617
persons. Source: U.S. Census Bureau, Population Estimates Program: natural change (births minus deaths), July 1 of the previous year to June 30 of the reported year; vintage 2020 files for 2011 to 2020 and the latest 2020s vintage from 2021. Retrieved 2026-10-12.

Full ranking

RankCounties2021
persons
1Western Connecticut Planning Region Estimated1,130
2Greater Bridgeport Planning Region Estimated720
3Naugatuck Valley Planning Region Estimated-213
4Northeastern Connecticut Planning Region Estimated-279
5South Central Connecticut Planning Region Estimated-311
6Capitol Planning Region Estimated-332
7Northwest Hills Planning Region Estimated-353
8Lower Connecticut River Valley Planning Region Estimated-419
9Southeastern Connecticut Planning Region Estimated-617

Other periods

About this ranking

Estimated births minus deaths of residents from July 1 of the previous year through June 30 of the reported year. A negative value means more deaths than births.

Equals births_july_june minus deaths_july_june for the same place and year. Not a calendar-year figure.

Every value in the ranking comes from the same publisher and the same period, so the counties are compared on one definition. Equal values share a rank.

How to cite

U.S. Census Bureau. Population Estimates Program: natural change (births minus deaths), July 1 of the previous year to June 30 of the reported year; vintage 2020 files for 2011 to 2020 and the latest 2020s vintage from 2021. https://www.census.gov/programs-surveys/popest/data/data-sets.html. Retrieved 2026-10-12.

Citation styles

The publisher is the author. Invokely is named only as the place the figures were read, where a style asks for it.

APA 7

U.S. Census Bureau. (2026). Population Estimates Program: natural change (births minus deaths), July 1 of the previous year to June 30 of the reported year; vintage 2020 files for 2011 to 2020 and the latest 2020s vintage from 2021 (Counties in Connecticut by natural change, July to June, 2021) [Data set]. Retrieved October 12, 2026, from https://www.census.gov/programs-surveys/popest/data/data-sets.html

MLA 9

Population Estimates Program: natural change (births minus deaths), July 1 of the previous year to June 30 of the reported year; vintage 2020 files for 2011 to 2020 and the latest 2020s vintage from 2021, Counties in Connecticut by natural change, July to June, 2021. U.S. Census Bureau, 26 Mar. 2026, https://www.census.gov/programs-surveys/popest/data/data-sets.html. Invokely, https://invokely.ai/rankings/natural-change-july-june/connecticut-counties?period=2021. Accessed 12 Oct. 2026.

Chicago (author-date)

U.S. Census Bureau. 2026. Population Estimates Program: natural change (births minus deaths), July 1 of the previous year to June 30 of the reported year; vintage 2020 files for 2011 to 2020 and the latest 2020s vintage from 2021. Counties in Connecticut by natural change, July to June, 2021. Dataset. Accessed October 12, 2026. https://www.census.gov/programs-surveys/popest/data/data-sets.html. Also distributed by Invokely, https://invokely.ai/rankings/natural-change-july-june/connecticut-counties?period=2021.

Harvard

U.S. Census Bureau (2026) Population Estimates Program: natural change (births minus deaths), July 1 of the previous year to June 30 of the reported year; vintage 2020 files for 2011 to 2020 and the latest 2020s vintage from 2021, Counties in Connecticut by natural change, July to June, 2021 [Dataset]. Available at: https://www.census.gov/programs-surveys/popest/data/data-sets.html, via Invokely: https://invokely.ai/rankings/natural-change-july-june/connecticut-counties?period=2021 (Accessed: 12 October 2026).

BibTeX
@misc{census_counties_in_connecticut_by_2021,
  author = {{U.S. Census Bureau}},
  title = {{Population Estimates Program: natural change (births minus deaths), July 1 of the previous year to June 30 of the reported year; vintage 2020 files for 2011 to 2020 and the latest 2020s vintage from 2021: Counties in Connecticut by natural change, July to June, 2021}},
  year = {2026},
  howpublished = {Data set},
  url = {https://www.census.gov/programs-surveys/popest/data/data-sets.html},
  urldate = {2026-10-12},
  note = {Accessed via Invokely, https://invokely.ai/rankings/natural-change-july-june/connecticut-counties?period=2021. Publisher attribution: U.S. Census Bureau. Population Estimates Program: natural change (births minus deaths), July 1 of the previous year to June 30 of the reported year; vintage 2020 files for 2011 to 2020 and the latest 2020s vintage from 2021. https://www.census.gov/programs-surveys/popest/data/data-sets.html. Retrieved 2026-10-12.},
}
RIS
TY  - DATA
AU  - U.S. Census Bureau
TI  - Population Estimates Program: natural change (births minus deaths), July 1 of the previous year to June 30 of the reported year; vintage 2020 files for 2011 to 2020 and the latest 2020s vintage from 2021: Counties in Connecticut by natural change, July to June, 2021
PY  - 2026
DA  - 2026/03/26
PB  - U.S. Census Bureau
DB  - Invokely
UR  - https://www.census.gov/programs-surveys/popest/data/data-sets.html
L2  - https://invokely.ai/rankings/natural-change-july-june/connecticut-counties?period=2021
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/natural-change-july-june/connecticut-counties?period=2021.
N1  - Publisher attribution: U.S. Census Bureau. Population Estimates Program: natural change (births minus deaths), July 1 of the previous year to June 30 of the reported year; vintage 2020 files for 2011 to 2020 and the latest 2020s vintage from 2021. https://www.census.gov/programs-surveys/popest/data/data-sets.html. Retrieved 2026-10-12.
ER  -
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Rank Counties in Connecticut by natural change, July to June using official data, and cite the source.
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Questions

Which county has the highest natural change, July to June?

Western Connecticut Planning Region, with 1,130 in 2021, according to the U.S. Census Bureau.

Which county has the lowest natural change, July to June?

Southeastern Connecticut Planning Region, with -617 in 2021.

Where does this ranking come from?

Every value comes from one source and one period, so the places are comparable: U.S. Census Bureau, Population Estimates Program: natural change (births minus deaths), July 1 of the previous year to June 30 of the reported year; vintage 2020 files for 2011 to 2020 and the latest 2020s vintage from 2021. Retrieved 2026-10-12.

Natural change, July to June: other rankings

Counties in Connecticut: more rankings