| Bayside Expo Center | |
|---|---|
 | |
| Address | 200 Mt Vernon St, |
| Location | Dorchester, Boston, Massachusetts 02125, United States |
| Coordinates | 42°19′18.07″N 71°2′48.95″W / 42.3216861°N 71.0469306°W |
| Owner | University of Massachusetts Boston |
| Built | 1965 (as Bayside Mall) |
| Opened | 1983 |
| Closed | 2010 |
| Demolished | 2016 |
Former names | Bayside Mall |
| Enclosed space | |
| • Total space | 275,000 square feet |
| Public transit access | JFK/UMass on the MBTA Red Line |
Bayside Expo Center (also known as the Bayside Expo and Conference Center) was a convention center located in Dorchester, Massachusetts. Originally opened as a shopping mall called Bayside Mall in the 1960s, the mall later failed and the convention center opened in its place. In 2010, it was purchased by the University of Massachusetts Boston after the building went into foreclosure. After the building's roof collapsed from the weight of accumulated snowfall during the 2014–15 North American winter, the university demolished the facility in 2016. In 2019, the University of Massachusetts board of trustees leased the property to Accordia Partners. In 2020, Accordia Partners proposed redeveloping the property into a 21-building mixed-used biotechnology science park called "Dorchester Bay City". In 2023, the Boston Planning & Development Agency approved the Accordia Partners proposal.