Fastest-growing counties in Connecticut
Fastest-growing counties in Connecticut
From 2018 to 2019, the U.S. population grew by .48%, its slowest rate in 100 years. Declining births, increasing deaths largely due to the graying Baby Boomer population, and a crackdown on immigration have contributed to many states seeing net population losses in recent years.
But in other pockets of the country, populations are growing. These shifts can be due to job opportunities, high quality of life, easy commutability to job centers, low rents, or any combination of these or other factors. Stacker compiled a list of the fastest-growing counties in Connecticut using data from the U.S. Census Bureau. Counties are ranked by the highest population growth from 2010 to 2019, based on 5-year estimates.
A county typically sees population growth as a “bedroom community” (a municipality with an atypically large commuting population) to a large city. These communities are typically quieter than their feeder cities, offer lower rents and a higher quality of living, and are remote enough to be immune to the feeder city’s crime, traffic, and crowds. Keep reading to see if your home county made the list.
#8. Litchfield County
--- #3,126 among all counties nationwide
- 2010 to 2019 percent population change: -4.2%
--- #8 among counties in Connecticut, #2,470 among all counties nationwide
- 2019 population: 182,002
--- #5 largest county in Connecticut, #358 largest county nationwide
#7. New London County
--- #3,105 among all counties nationwide
- 2010 to 2019 percent population change: -1.8%
--- #7 among counties in Connecticut, #1,958 among all counties nationwide
- 2019 population: 267,390
--- #4 largest county in Connecticut, #253 largest county nationwide
#6. Middlesex County
--- #2,903 among all counties nationwide
- 2010 to 2019 percent population change: -1.0%
--- #6 among counties in Connecticut, #1,785 among all counties nationwide
- 2019 population: 163,053
--- #6 largest county in Connecticut, #399 largest county nationwide
#5. Windham County
--- #2,735 among all counties nationwide
- 2010 to 2019 percent population change: -1.0%
--- #5 among counties in Connecticut, #1,769 among all counties nationwide
- 2019 population: 116,566
--- #8 largest county in Connecticut, #529 largest county nationwide
#4. Tolland County
--- #1,570 among all counties nationwide
- 2010 to 2019 percent population change: 0.0%
--- #4 among counties in Connecticut, #1,562 among all counties nationwide
- 2019 population: 151,063
--- #7 largest county in Connecticut, #436 largest county nationwide

#3. New Haven County
--- #1,030 among all counties nationwide
- 2010 to 2019 percent population change: +0.1%
--- #3 among counties in Connecticut, #1,544 among all counties nationwide
- 2019 population: 857,513
--- #3 largest county in Connecticut, #66 largest county nationwide
#2. Hartford County
--- #517 among all counties nationwide
- 2010 to 2019 percent population change: +0.6%
--- #2 among counties in Connecticut, #1,437 among all counties nationwide
- 2019 population: 893,561
--- #2 largest county in Connecticut, #61 largest county nationwide
#1. Fairfield County
--- #134 among all counties nationwide
- 2010 to 2019 percent population change: +4.3%
--- #1 among counties in Connecticut, #879 among all counties nationwide
- 2019 population: 943,926
--- #1 largest county in Connecticut, #53 largest county nationwide


