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This list of tallest buildings in Connecticut ranks the tallest skyscrapers in Connecticut by height, that stand at least 250 feet (76 meters).
The tallest building in Connecticut is City Place I in Hartford which is 535 feet (163 meters) tall and has 38 stories.
| Rank | Name | Image | Height ft (m) | Floors | Year | City | Notes | Use |
|---|---|---|---|---|---|---|---|---|
| 1 | City Place I |  | 535 (163) | 38 | 1980 | Hartford | Tallest building in Hartford and Connecticut since 1980. | Office |
| 2 | Travelers Tower |  | 528 (161) | 24 | 1919 | Hartford | Was the tallest building in the world outside of New York City upon completion. | Office |
| 3 | Goodwin Square |  | 522 (159) | 30 | 1989 | Hartford | Office tower was built into the historic Goodwin Hotel. | Office |
| 4 | Hartford 21 |  | 440 (134) | 36 | 2006 | Hartford | Built on the site of the former Civic Center Mall. | Residential |
| 5 | Mohegan Sun Sky Tower |  | 392 (119) | 36 | 2002 | Uncasville | Tallest building in Connecticut outside of Hartford | Hotel/Casino |
| 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. | Office |
| 8 | Park Tower Stamford |  | 377 (115) | 34 | 2009 | Stamford | Tallest building in Stamford | Residential |
| 9 | 777 Main Street |  | 361 (110) | 26 | 1967 | Hartford | Until 2011, the Hartford office of Bank of America. Converted to residential use in 2015. | Residential |
| 10 | 280 Trumbull Street |  | 348 (106) | 28 | 1984 | Hartford | Office | |
| 11 | 360 State Street |  | 338 (103) | 31 | 2010 | New Haven | Residential | |
| 12 | One Financial Plaza |  | 335 (102) | 26 | 1975 | Hartford | Also known as the Gold Building. | 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. | 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 | 2021 | Stamford | Residential | ||
| 23 | Atlantic Station West | 282 (86) | 26 | 2021 | 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 | |
|---|---|---|---|---|---|---|
| 180 Allyn Street | 878 (267) | 59 | 1991 | Canceled | Office | |
| 677-707 Washington boulevard | 423 (128) | 34 | Approved | Will be the tallest building in Stamford | mixed use |
* Table entries with dashes (—) indicate that information regarding building heights, floor counts, or dates of completion has not yet been released.
Key Tower is a skyscraper on Public Square in downtown Cleveland, Ohio. Designed by architect César Pelli, it is the tallest building in the state of Ohio, the 39th-tallest in the United States, and the 165th-tallest in the world. The building reaches 57 stories or 947 feet (289 m) to the top of its spire, and it is visible from up to 20 miles (32 km) away. The tower contains about 1.5 million square feet (139,355 m²) of office space.
The XL Center is a multi-purpose arena and convention center located in downtown Hartford, Connecticut. Owned by the City of Hartford, it is managed by the quasi-public Capital Region Development Authority (CRDA) under a lease with the city and operated by Spectra. In December 2007, the center was renamed when the arena's naming rights were sold to XL Group insurance company in a six-year agreement. The arena is ranked the 28th largest among college basketball arenas. It opened in 1975 as the Hartford Civic Center and was originally located adjacent to Civic Center Mall, which was demolished in 2004. It consists of two facilities: the Veterans Memorial Coliseum and the Exhibition Center.
The Federation Tower is a complex of two skyscrapers built on the 13th lot of the Moscow International Business Center in Moscow, Russia. The two skyscrapers are named Tower East or Vostok and Tower West or Zapad.
The White Magnolia Plaza, also known as Sinar Mas Center, is a skyscraper whose construction was earlier suspended, but resumed construction in 2013, and was completed on January 4, 2017. It is located north of the Bund, the historic riverfront district of Shanghai, adjacent to the international cruise terminal. The original proposal called for a 388-meter (1,273-foot) tower, but it was later scaled down to 260 meters, and then the third and final design was changed to 319.5 meters.
City Place I is a 38-story, 163.7 m (537 ft) skyscraper at 185 Asylum Street in Hartford, Connecticut. It is the tallest building in the state, tallest building in New England outside of Boston, and two meters taller than Travelers Tower, built in 1919. City Place I was designed by Skidmore, Owings & Merrill, and completed in 1980. The majority of the building is office space, though there are various restaurant and retail establishments found on the lower floors.
The Phoenix Mutual Life Insurance Building, locally called the "Boat Building", is a notable Modernist office building located on Constitution Plaza in Hartford, Connecticut. Designed by Max Abramovitz and completed in 1963, it is listed on the National Register of Historic Places and is the world's first two-sided building. It is home to Nassau Financial Group.
Suzhou Zhongnan Center is a stalled 499.2-metre (1,638 ft) tall building in Suzhou Industrial Park (SIP), Suzhou, Jiangsu, China. Original plans called for a height of 729 metres (2,391.7 ft) but plans were scrapped in 2019 in compliance with China's ban on buildings taller than 500 metres (1,641 ft). The new tower was proposed in 2019 and construction started less than a year later however was put on-hold in mid 2022.
Baoneng Shenyang Global Financial Center is an unfinished high-rise development located in Shenyang, Liaoning, China.
Hartford 21 is a 36-story, 134 m (440 ft) skyscraper located at 211 Trumbull Street in Downtown Hartford, Connecticut. It is the fourth tallest building in Hartford and the fifth in the state.
The Exchange 106 (Malay: Menara Exchange 106, formerly known as the TRXSignature Tower, is a 453.6-meter-tall supertall skyscraper in Kuala Lumpur, Malaysia. It is the second-tallest building in Malaysia and the third-tallest building in Southeast Asia. The 397.3-meter building is topped with an 11-story high illuminated crown, giving it a total height of 453.6 m. It is also the second largest skyscraper in Malaysia by floor area with 453,835 m2. The tower has a net lettable area of 240,000 square metres. It is also the centerpiece of the new Tun Razak Exchange financial district.