Venues of the 1976 Summer Olympics

An incomplete Olympic Stadium meant weather played a factor in many of the sporting events that took place. An example of this was in the men's high jump final where rain began when the height was at 7 ft 1.75 in (2.18 m) and was coming down so heavily at 7 ft 3 in (2.21 m) that large puddles formed in the high jump area.^[35] This forced world record holder Dwight Stones of the United States to grab a squeegee and start mopping up the mess himself.^[35] Other high jumpers joined Stones, including Canada's Greg Joy, to help mop up the area.^[35] Gold medalist Jacek Wszoła of Poland stated he won the high jump event when it started raining.^[35] Joy would win silver while Stones would win bronze in the event.^[35] The same hard rain that affected the men's high jump also affected the men's 4 × 400 m relay.^[36]

Heavy rain also affected the football final at Olympic Stadium where East Germany defeated Poland 3-1.^[37][38]

A strong and unpredictable headwind in the men's pole vault final affected the last man in the competition, David Roberts of the United States, and his attempt to clear 18 ft 4.5 in (5.60 m).^[39] Roberts missed at all three attempts and finished with a bronze.^[39]

Poor weather also affected the trap shooting event where Donald Haldeman of the United States won with a score of 190.^[40]

The pool itself produced a total of 27 swimming world records in 22 events during the Games.^[31]

In the opening heat of the canoeing K-1 1000 m event, changes in barometric pressure affected the sensitivity of the electronic scales to where it caused kayaks that were in spec on weight to be underweight.^[41] This led to the disqualifications of Italy's Oreste Perri, the co-world champion, and Romania's Vasile Dîba though both disqualifications were rescinded by the International Canoe Federation.^[41]

In 1977, Major League Baseball's (MLB) Montreal Expos moved into Olympic Stadium from their home at Jarry Park Stadium.^[42] Jarry Park was the Expos's home from their founding in 1969 until 1976.^[43][44] Olympic Stadium became the first venue outside of the United States to host the MLB All-Star Game in 1982.^[45] The same year that the Expos moved into Olympic Stadium also saw the CFL's Alouettes move into, where they would stay until 1981 when they went bankrupt.^[46] The Alouettes were sold to Montreal businessman Charles Bronfman in 1982 and renamed the Concordes until 1986, when they readopted the Alouettes name in 1987, then folded that same year.^[46] The CFL's American experiment of 1993–95, which saw the creation of the Baltimore Stallions in 1994, ended in failure; the Stallions, by far the most successful of the U.S. teams, moved to Montreal to be renamed the Alouettes.^[46] In 1991, Olympic Stadium was remodeled with 12,000 fewer seats for the Expos.^[47] A 55-ton structural element collapsed in September 1991, forcing the Expos to play two home games on the road.^[47] By 1998, the Alouettes moved from Olympic Stadium to Molson Stadium where they have remained to this day.^[46] The 1976 main venue also hosted the Grey Cup six times between 1977 and 2008.^[48][49] Olympic Stadium would finally have its inclined tower finished in full in 1987 along with the retractable roof.^[50] The roof however continued to give problems to the Olympic Stadium with it tearing apart.^[50] A replacement roof, which was fixed, started in 1997 and was finished in 1998.^[50] The last two seasons of the Expos were split between Montreal and San Juan, Puerto Rico, before they moved to Washington, D.C., in 2005 to become the Washington Nationals.^[47][51] Montreal's last baseball game was on 29 September 2004, a 9-1 loss to the defending World Series champion Florida Marlins.^[52]

The Forum would serve as home to the NHL Canadiens where they would win five more Stanley Cups between the 1976 Games and them moving to the Molson Centre (Bell Centre since 2002) during the 1995-96 NHL season.^[53] It was named a National Historic Site of Canada in 1997.^[54]

A feasibility study was done on the velodrome in 1988 to convert the venue into an indoor zoo. This was completed the following year with renovations commencing between 1989 and 1992. The venue, now known as the Montreal Biodôme, opened on 19 June 1992.^[55]

Île-Notre Dame serves multiple uses as of 2023. The canoeing and rowing basin has hosted World Rowing Championships special events in 1984 and 1992.^[56][57] The venue hosted the ICF Canoe Sprint World Championships in 1986.^[58] West of the basin on the island is Circuit Gilles Villeneuve which opened in 1978.^[59] The circuit has hosted the Formula One Canadian Grand Prix every year except 1987, 2009, and 2020.^{[60][61][62][63]}