[2] In 2004, the Impact won the A-League championship by defeating the Seattle Sounders 2–0 at Centre Claude Robillard in Montréal, in front of a crowd of 13,648—a new attendance record for the club at the time.

[2][7] The Impact repeated as Commissioner's Cup winners in 2006 and won their first USL playoff championship in 2009 after they defeated the Vancouver Whitecaps 6–3 on aggregate in the two-legged final.

[2][5] The Impact won the first seven editions of the Voyageurs Cup, the domestic trophy for professional soccer in Canada awarded to the best Canadian team in the USL First Division, from 2002 to 2007.

In response to Vancouver's successful bid in March 2009, Impact GM Nick De Santis commented that he expected chairman Saputo to pursue and realize his vision of Montreal as an MLS franchise someday.

[18] On May 7, 2010, Garber and Saputo announced Montreal as the nineteenth club in Major League Soccer, set to begin play for the 2012 season.

The club began building their roster for their inaugural MLS season in October 2011 with the signing of defenseman Nelson Rivas, previously of Inter Milan.

From their NASL roster, the Impact re-signed defender Hassoun Camara, goalkeeper Evan Bush and midfielder Sinisa Ubiparipovic to new MLS contracts.

Through the MLS expansion draft, the Impact were able to select in November 2011 ten more players, most notably midfielder and American international Justin Mapp.

Veteran forward and long-time Impact player Eduardo Sebrango was invited to training camp and in February 2012 was awarded an MLS contract.

The match attracted 58,912 spectators, surpassing the previous record for professional soccer in Montréal established in a 1981 Montreal Manic home game against the Chicago Sting (58,542).

[23] On May 12, 2012, the Impact set a new attendance record for a professional soccer match in Canada[24] with a crowd of 60,860 spectators during a game against the Los Angeles Galaxy which ended in 1–1 draw.

On November 3, 2012, head coach Jesse Marsch stepped down due to a difference of opinion with club management over how the team should move forward.

On February 23, the Impact won the 2013 Walt Disney World Pro Soccer Classic, beating Columbus Crew 1–0 in the final during their pre-season campaign.

On May 29, the club won the 2013 Canadian Championship by defeating Vancouver Whitecaps FC in the final, the Impact's first major trophy since joining MLS[25] and their eighth Voyageurs Cup.

2014 season The Impact became repeat Voyageurs Cup champions by defeating Toronto FC in the 2014 Canadian Championship final on June 4, 2014.

However, in the dying seconds of stoppage time, substitute Cameron Porter controlled a long pass from Callum Mallace, fought off a defender and slipped the ball between the legs of Pachuca's goalkeeper to tie the game thus sending the Impact to the semi-finals on away goals (3-3 aggregate).

On August 29, 2015, head coach Frank Klopas was fired and replaced on an interim basis by former Impact player Mauro Biello.

After qualifying for the playoffs and defeating Toronto FC in the first round before being eliminated in the Conference semi-finals by the Columbus Crew, Biello was hired permanently.

[30] Despite his success in the Canadian Championship, Cabrera failed to lead the team to the MLS playoffs and his contract was not renewed for the following season.

[36] CF Montréal were knocked out of the 2022 MLS playoffs in the Eastern Conference Semifinals by New York City FC by a score of 3–1, at Stade Saputo.

The fleur-de-lis, which also appeared on the logo of the NASL Impact team, is a globally recognized symbol of French heritage, and features prominently on the flag of Quebec as a reflection of Québécois culture.

The Ultras were a highly active group, known for their unwavering 90 minute chants, use of smoke grenades, creating large tifos, waving flags, and organizing road trips to follow the club on away games.

The conflict was a culmination of things that started almost exclusively with the rebranding of the club and abandonment of the highly popular team name, Impact de Montréal.

Named after the founding year of Montreal, "1642 MTL" is a supporters group formed in 2015 and located directly behind the net, on the north side of Saputo Stadium, in section 114.

[52] The "North Star" or "L'Étoile du Nord" in French is a 5-foot (1.5 m) high, 44-inch (110 cm) wide, 1,576-pound (715 kg) bell acquired by the 1642 MTL supporters group as a goal and victory celebration.

[53] Since then, numerous personalities from the sports, cultural and art worlds, including many famous Montrealers and others linked to the city have been invited to ring the bell.

[56] The first leg of the series at Stade Olympique in Montréal holds the record for the largest attendance for a match featuring two Canadian soccer teams[57] with 61,004 fans.

[58] The following table lists the history of official matches in MLS and the Canadian Championship between CF Montréal and Toronto FC.

[63] That agreement ended when the Ottawa Fury were dissolved on November 8, 2019, and their USL franchise rights sold to Miami FC the following month.

[69] CHMP 98.5 FM served as the club's French-language radio flagship from 2015 through 2020,[71] with Jeremy Filosa on play-by-play and analyst Arcadio Marcuzzi.