The smallest Connecticut county in terms of economic output had the state's largest GDP growth in percentage terms last year.
Windham County’s gross domestic product grew 2.6% in 2019, the highest among Connecticut’s eight counties, according to the U.S. Bureau of Economic Analysis.
| 2017 | 2018 | 2019 | 2017 | 2018 | 2019 | |
| Connecticut | $248.1B | $249B | $251B | 0.9% | 0.4% | 0.9% |
| Fairfield | $79B | $79.3B | $79.8B | -0.3% | 0.3% | 0.7% |
| Hartford | $79B | $79.5B | $79.9B | 1.4% | 0.2% | 0.6% |
| Litchfield | $7.5B | $7.4B | $7.6B | -0.1% | -1.1% | 2.1% |
| Middlesex | $8.8B | $8.5B | $8.7B | 1.2% | -2.6% | 1.6% |
| New Haven | $46.7B | $47.7B | $48.4B | 0.7% | 2.1% | 1.5% |
| New London | $17.3B | $17.2 | $17.3B | 4.5% | -0.4% | 0.7% |
| Tolland | $4.9B | $4.8B | $4.9B | 4.3% | -1.9% | 0.4% |
| Windham | $4.5B | $4.6B | $4.7B | -1.9% | 1.1% | 2.6% |
Next highest was Litchfield County, which grew 2.1%, followed by Middlesex (1.6%) and New Haven (1.5%) counties.
At $4.68 billion, Windham County has the smallest GDP among Connecticut counties in 2019.
Litchfield County’s 2.1% GDP growth pushed its economy to $7.6 billion in 2019.
Hartford and Fairfield counties have the largest economies, each with a 2019 GDP of around $79 billion.
But neither county had appreciable growth in 2019 as Fairfield’s GDP grew by just 0.7% while Hartford’s increased by 0.6%.
New London County’s year-over-year growth was 0.7% while Tolland County has the smallest increase at 0.4%.
State GDP
The state’s overall GDP growth was 0.9%, from roughly $249 billion in 2018 to $251 billion in 2019.
That placed Connecticut near the bottom of the New England states.
Only Vermont at 0.8% had slower growth than Connecticut.
Connecticut's overall GDP growth was 0.9%, from roughly $249 billion in 2018 to $251 billion in 2019.
Maine led New England states with a 2.6% increase in its GDP, followed by Massachusetts (2.4%), New Hampshire (1.4%), and Rhode Island (1%).
Nationwide, New Mexico had the largest growth at 5.2% followed by Washington (4.6%), Colorado (3.9%), Utah (3.8%), and California and Idaho (3.4% each).
As a whole, the country’s GDP grew 2.2% in 2019, down from 3% growth in 2018.