This list of tallest buildings in Connecticut includes every building in the state of Connecticut that is at least 250abbr=offNaNabbr=off tall.
The tallest building in Connecticut is City Place I in Hartford which is 535abbr=offNaNabbr=off tall and has 38 stories.
| Rank | Name | Image | Heightft (m) | Floors | Year | City | Notes | Use |
|---|---|---|---|---|---|---|---|---|
| 1 | City Place I | 535feet | 38 | 1980 | Hartford | Tallest building in Hartford and Connecticut since 1980. Tallest building in Connecticut constructed in the 1980s. | Office | |
| 2 | Travelers Tower | 528feet | 24 | 1919 | Hartford | Was the tallest building in the world outside of New York City upon completion. Tallest building in Connecticut constructed in the 1910s. | Office | |
| 3 | Goodwin Square | 522feet | 30 | 1989 | Hartford | Office tower was built into the historic Goodwin Hotel. | Office | |
| 4 | Mohegan Sun Sky Tower | 492feet | 36 | 2002 | Uncasville | Tallest building in Connecticut outside of Hartford | Hotel/Casino | |
| 5 | Hartford 21 | 440feet | 36 | 2006 | Hartford | Built on the site of the former Civic Center Mall. Tallest building in Connecticut constructed in the 2000s. | Residential | |
| 6= | Otis Elevator Test Tower | 383feet | 38 | 1986 | Bristol | Tallest building in Bristol. Owned by the Otis Elevator Company. | Industrial | |
| 6= | Connecticut Financial Center | 383feet | 26 | 1990 | New Haven | Tallest building in New Haven. Tallest building in Connecticut constructed in the 1990s. | Office | |
| 8 | 777 Main Street | 361feet | 26 | 1967 | Hartford | Until 2011, the Hartford office of Bank of America. Converted to residential use in 2015. Tallest building in Connecticut constructed in the 1960s. | Residential | |
| 9 | Park Tower Stamford | 350feet | 34 | 2009 | Stamford | Tallest building in Stamford | Residential | |
| 10 | 280 Trumbull Street | 348feet | 28 | 1984 | Hartford | Office | ||
| 11 | 360 State Street | 338feet | 31 | 2010 | New Haven | Tallest building in Connecticut constructed in the 2010s. | Residential | |
| 12 | One Financial Plaza | 335feet | 26 | 1975 | Hartford | Also known as the Gold Building. Tallest building in Connecticut constructed in the 1970s. | Office | |
| 13 | Foxwoods | 325feet | 26 | 2007 | Ledyard | Hotel/Casino | ||
| 14 | Knights of Columbus Building | 321feet | 23 | 1969 | New Haven | Office | ||
| 15= | 2 Park Place | 309feet | 25 | Hartford | Twin tower of 24 Park Place | Residential | ||
| 15= | 24 Park Place | 309feet | 25 | Hartford | Twin tower of 2 Park Place | Residential | ||
| 17 | One State Street | 297feet | 24 | 1983 | Hartford | Office | ||
| 18 | One Landmark Square | 295feet | 21 | 1973 | Stamford | Office | ||
| 19 | Connecticut State Capitol | 287feet | 6 | 1878 | Hartford | Contains the office of the Governor of Connecticut and the Connecticut General Assembly. Tallest building in Connecticut constructed in the 19th century. | Government | |
| 20 | One Corporate Center | 285feet | 23 | 1981 | Hartford | Office | ||
| 21 | Cathedral of Saint Joseph | 284feet | 7 | 1962 | Hartford | Mother church of the Roman Catholic Archdiocese of Hartford. | Religious (Cathedral) | |
| 22= | Atlantic Station Stamford | 282feet | 26 | 2018 | Stamford | Tallest building in Connecticut constructed in the 2020s. | Residential | |
| 22= | Atlantic Station West | 282feet | 26 | 2021 | Stamford | Tallest building in Connecticut constructed in the 2020s. | Residential | |
| 24 | Hilton Hartford | 281feet | 21 | 1975 | Hartford | Hotel | ||
| 25= | Hartford Marriott Downtown | 272feet | 22 | 2005 | Hartford | Hotel | ||
| 25= | Hartford Plaza | 272feet | 22 | 1967 | Hartford | Headquarters of The Hartford Financial Services Group. | Office | |
| 27 | Bushnell Tower | 263feet | 28 | 1969 | Hartford | Residential | ||
| 28 | One Constitution Plaza | 257feet | 20 | 1963 | Hartford | Part of the Constitution Plaza complex. | Office | |
| 29= | Summer House Apartments | 250feet | 22 | 2016 | Stamford | residential | ||
| 29= | Kline Biology Tower | 250feet | 16 | 1966 | New Haven | 46th-tallest educational building in the world. | Educational | |
This lists buildings that are under construction, approved for construction or proposed for construction in Connecticut.
| Name | Height*ft (m) | Floors* | Year*(est.) | Status | Notes | ||
|---|---|---|---|---|---|---|---|
| 677-707 Washington boulevard | 423feet | 34 | Approved | Will be the tallest building in Stamford | mixed use | ||
| 3 Landmark Square | 320feet | 31 | Approved | Will be the second tallest building in Stamford | Residential |