Connecticut: population and components of change
Source: U.S. Census Bureau, Population Estimates Program, Vintage 2024: County Population Totals and Components of Change 2020-2024 (CO-EST2024-ALLDATA). Figures cover the April 1, 2020 estimates base through July 1, 2024; data fetched 2026-10-30T08:41:21Z.
| Item | Value | As reported |
|---|---|---|
| State | Connecticut | Connecticut |
| State FIPS code | 09 | 09 |
| Census region (code) | 1 | 1 |
| Census division (code) | 1 | 1 |
| Estimates base, April 1, 2020 | 3,607,701 | 3607701 |
| Resident population, July 1, 2020 | 3,579,918 | 3579918 |
| Resident population, July 1, 2021 | 3,606,607 | 3606607 |
| Resident population, July 1, 2022 | 3,617,925 | 3617925 |
| Resident population, July 1, 2023 | 3,643,023 | 3643023 |
| Resident population, July 1, 2024 | 3,675,069 | 3675069 |
| Numeric population change, 2023 to 2024 | 32,046 | 32046 |
| Births, year to July 1, 2024 | 34,609 | 34609 |
| Deaths, year to July 1, 2024 | 32,778 | 32778 |
| Natural change (births minus deaths), year to July 1, 2024 | 1,831 | 1831 |
| International migration, year to July 1, 2024 | 36,214 | 36214 |
| Domestic migration, year to July 1, 2024 | -6,060 | -6060 |
| Residual, year to July 1, 2024 | 61 | 61 |
| Birth rate per 1,000 population, year to July 1, 2024 | 9.4585 | 9.4584763351 |
| Death rate per 1,000 population, year to July 1, 2024 | 8.9581 | 8.958072678 |
| Natural change rate per 1,000 population, year to July 1, 2024 | 0.5004 | 0.5004036571 |
| International migration rate per 1,000 population, year to July 1, 2024 | 9.8971 | 9.897115259 |
| Domestic migration rate per 1,000 population, year to July 1, 2024 | -1.6562 | -1.656169395 |
| Group quarters population, July 1, 2024 | 109,215 | 109215 |
Values as reported by the source: state_name=Connecticut, state_fips=09, region=1, division=1, estimates_base_2020=3607701, pop_2020=3579918, pop_2021=3606607, pop_2022=3617925, pop_2023=3643023, pop_2024=3675069, npopchg_2024=32046, births_2024=34609, deaths_2024=32778, naturalchg_2024=1831, internationalmig_2024=36214, domesticmig_2024=-6060, residual_2024=61, rbirth_2024=9.4584763351, rdeath_2024=8.958072678, rnaturalchg_2024=0.5004036571, rinternationalmig_2024=9.897115259, rdomesticmig_2024=-1.656169395, gq_estimates_2024=109215
Counties and county equivalents in Connecticut
These county records carry the same state FIPS code as this state record.
| County FIPS code | County | Resident population, July 1, 2020 | Resident population, July 1, 2024 | Numeric population change, 2023 to 2024 | Births, year to July 1, 2024 | Deaths, year to July 1, 2024 | Natural change (births minus deaths), year to July 1, 2024 | International migration, year to July 1, 2024 | Domestic migration, year to July 1, 2024 | Residual, year to July 1, 2024 |
|---|---|---|---|---|---|---|---|---|---|---|
| 110 | Capitol Planning Region | 964,088 | 991,508 | 8,182 | 9,287 | 9,254 | 33 | 9,950 | -1,829 | 28 |
| 120 | Greater Bridgeport Planning Region | 324,397 | 335,666 | 4,366 | 3,360 | 2,497 | 863 | 5,167 | -1,677 | 13 |
| 130 | Lower Connecticut River Valley Planning Region | 173,281 | 177,540 | 866 | 1,387 | 1,685 | -298 | 834 | 333 | -3 |
| 140 | Naugatuck Valley Planning Region | 449,055 | 462,220 | 4,611 | 4,357 | 4,242 | 115 | 3,410 | 1,102 | -16 |
| 150 | Northeastern Connecticut Planning Region | 95,231 | 97,701 | 867 | 791 | 962 | -171 | 276 | 770 | -8 |
| 160 | Northwest Hills Planning Region | 112,199 | 114,101 | 563 | 901 | 1,125 | -224 | 329 | 472 | -14 |
| 170 | South Central Connecticut Planning Region | 564,526 | 576,718 | 3,799 | 5,641 | 5,375 | 266 | 5,328 | -1,802 | 7 |
| 180 | Southeastern Connecticut Planning Region | 278,379 | 282,602 | 1,980 | 2,559 | 2,870 | -311 | 1,388 | 888 | 15 |
| 190 | Western Connecticut Planning Region | 618,762 | 637,013 | 6,812 | 6,326 | 4,768 | 1,558 | 9,532 | -4,317 | 39 |