This list of tallest buildings in Connecticut ranks the tallest skyscrapers in Connecticut by height, that stand at least 250abbr=offNaNabbr=off.
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 | 535 (163) | 38 | 1980 | Hartford | Tallest building in Hartford and Connecticut since 1980. Tallest building in Connecticut constructed in the 1980s. | Office | |
| 2 | Travelers Tower | 528 (161) | 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 | 522 (159) | 30 | 1989 | Hartford | Office tower was built into the historic Goodwin Hotel. | Office | |
| 4 | Residential Mohegan Sun Sky Tower | 492(119) | 36 | 2002 | Uncasville | Tallest building in Connecticut outside of Hartford | Hotel/Casino | |
| 5 | Hartford 21 | 440 (134) | 36 | 2006 | Hartford | Built on the site of the former Civic Center Mall. Tallest building in Connecticut constructed in the 2000s. | Residential Mohegan Sun Sky Tower | |
| 6 | Otis Elevator Test Tower | 383 (117) | 38 | 1986 | Bristol | Tallest building in Bristol. Owned by the Otis Elevator Company. | Industrial | |
| 7 | Connecticut Financial Center | 383 (117) | 26 | 1990 | New Haven | Tallest building in New Haven. Tallest building in Connecticut constructed in the 1990s. | Office | |
| 8 | 777 Main Street | 361 (110) | 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 | 350 (106) | 34 | 2009 | Stamford | Tallest building in Stamford | Residential | |
| 10 | 280 Trumbull Street | 348 (106) | 28 | 1984 | Hartford | Office | ||
| 11 | 360 State Street | 338 (103) | 31 | 2010 | New Haven | Tallest building in Connecticut constructed in the 2010s. | Residential | |
| 12 | One Financial Plaza | 335 (102) | 26 | 1975 | Hartford | Also known as the Gold Building. Tallest building in Connecticut constructed in the 1970s. | Office | |
| 13 | Foxwoods | 325(99) | 26 | 2007 | Ledyard | Hotel/Casino | ||
| 14 | Knights of Columbus Building | 321 (98) | 23 | 1969 | New Haven | Office | ||
| 15 | 2 Park Place | 309 (94) | 25 | Hartford | Twin tower of 24 Park Place | Residential | ||
| 16 | 24 Park Place | 309 (94) | 25 | Hartford | Twin tower of 2 Park Place | Residential | ||
| 17 | One State Street | 297 (91) | 24 | 1983 | Hartford | Office | ||
| 18 | One Landmark Square | 295 (90) | 21 | 1973 | Stamford | Office | ||
| 19 | Connecticut State Capitol | 287 (87) | 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 | 285 (87) | 23 | 1981 | Hartford | Office | ||
| 21 | Cathedral of Saint Joseph | 284 (87) | 7 | 1962 | Hartford | Mother church of the Roman Catholic Archdiocese of Hartford. | Religious (Cathedral) | |
| 22 | Atlantic Station Stamford | 282 (86) | 26 | 2018 | Stamford | Tallest building in Connecticut constructed in the 2020s. | Residential | |
| 23 | Atlantic Station West | 282 (86) | 26 | 2021 | Stamford | Tallest building in Connecticut constructed in the 2020s. | Residential | |
| 24 | Hilton Hartford | 281 (86) | 21 | 1975 | Hartford | Hotel | ||
| 25 | Hartford Marriott Downtown | 272 (83) | 22 | 2005 | Hartford | Hotel | ||
| 26 | Hartford Plaza | 272 (83) | 22 | 1967 | Hartford | Headquarters of The Hartford Financial Services Group. | Office | |
| 27 | Bushnell Tower | 263 (80) | 28 | 1969 | Hartford | Residential | ||
| 28 | One Constitution Plaza | 257 (78) | 20 | 1963 | Hartford | Part of the Constitution Plaza complex. | Office | |
| 29 | Summer House Apartments | 250 (76) | 22 | 2016 | Stamford | residential | ||
| 30 | Kline Biology Tower | 250 (76) | 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 | 423 (128) | 34 | Approved | Will be the tallest building in Stamford | mixed use | ||
| 3 Landmark Square | 320 (97.5) | 31 | Approved | Will be the second tallest building in Stamford | Residential |