In 1975, after a period of dominance in the CNSL, the organization purchased the Toronto Metros of the North American Soccer League and retained their heritage by inserting Croatia into the team's name.

[8] Among the influx of players were Alan Harvey, Rudolf Milicevic, Najrudin Jazic, Jerko Granic, Osvaldo Gonzales, Harry de Vlugt, Lutz Wolansky, Aleja Solak, and Marijan Bilic.

Under the leadership of Jazbinšek the team claimed its first treble by winning the regular season title, NSL Championship, and the Croatian-North American Soccer Tournament.

[10] For the 1972 season Vladimir Šimunić replaced Jazbinšek and helped secure another regular-season title and the NSL Cup, while Bilecki received his second Goalkeeper of the Year award.

[15][16] His immediate replacement was former-player Marijan Bilić as an interim coach, and a suitable successor was found in Domagoj Kapetanović,[17] an immigrant to Canada who had played for Dinamo Zagreb.

The club's successes, despite the instabilities it found in each of the leagues in which it had played, showed what a small ethnic group could accomplish in the North American sport.

Some of the notable players and managers arriving at that time were Drago Šantić (Sibenik), Velimir Crljen (Zadar), Dubravko Ledić (Mostar), and Mišo Smajlović.

This activity culminated in a trip to Croatia sponsored by the Croatian Ministry of Sports and Culture, featuring Toronto against Dinamo Zagreb, Hajduk Split, Osijek, Rijeka, Varazdin, and Tomislavgrad.

[citation needed] With numerous players brought in from Croatia including Josip Lukacevic, Ivan Simic, Goran Pavlic, Mate Stanic, Robert Rupcic and the local youth system providing young talent (Joe Buntic, Frank Delisimunovic, Rob Milek, Anton Granic), the team won the NSL SuperCup and Croatian North American Soccer tournament.

During the PUMA league era, Velimir Crljen, Goran Grubesic, Frank Delisimunovic and Anton Granic were voted to the All Star team).

[33][34] In preparation for their CPSL debut the club brought in former Dinamo Zagreb manager Rudolf Belin[35] and signed new additions due to the retirement of several key players.

[36] They made their CPSL debut on June 3, 1998 in a Canada Cup match against Glen Shields, where they were defeated 3–1 with Stephen Warren providing their only goal.

Though Toronto failed in repeating their previous season performance they achieved a postseason berth by finishing third in the standings with the league's second-best offensive and defensive records.

[50] Toronto Croatia won their Canada Cup tournament group and advanced to the semifinals, where they were defeated by the Olympians in a 3–2 penalty shootout.

This time Croatia avenged their previous defeats with the Draganic brothers producing goals for a 2–1 championship victory which denied the Olympians back-to-back trebles.

[54] Bruno Pilaš returned as head coach for the 2001 season, when the club relocated to Streetsville, Mississauga to play at Memorial Park, where Mayor Hazel McCallion performed the ceremonial kickoff.

[61] His dismissal came following the team's defeat in the annual Croatian-North American Soccer Tournament, in which he placed his son, back-up goalkeeper Anthony Brala, into the starting line-up instead of George Azcurra.

To improve the team's situation, Crljen used the club's overseas connections to bring in players including Josip Juric, Antonijo Zupan, Jure Pavic, Ivica Raguz, and Ante Pavlovic.

[73] Croatia defeated Western Conference champions Hamilton Thunder 2–0,[73] and in the finals beat the Vaughan Shooters 4–0 with Marasovic, Marko Milicevic, and Zupan scoring the goals.

[74] Crljen returned for his third term as head coach in 2005, with the team acquiring Caribbean talent Hayden Fitzwilliams, Caswain Mason, and Halburto Harris.

[80] In 2006 the CPSL re-branded itself as the Canadian Soccer League (CSL), and introduced the International Division which represented the various ethnic communities in the Greater Toronto Area.

[81] The launch of the division saw the return of Toronto Croatia's traditional rivals, the Serbian White Eagles, which revived their historical derby match.

In the regular season Croatia continued their battle with the White Eagles over the primacy of the International Division, a rivalry which helped increase attendance throughout the CSL.

[98] In the CSL championship finals their rivalry with Serbia reached its climax; lacking an adequate stadium available in order to separate the fans the league was forced to change the format to a two-leg game rather than the standard knockout.

[107] Former Prva HNL manager Miroslav Buljan was hired for the 2008 season and strengthened the roster with the additions of Tonći Pirija and Hugo Herrera.

[112][113] Before the start of the season the club moved to Centennial Park Stadium in the Toronto district of Etobicoke, as the Hershey Centre did not meet the standards of a professional facility.

[123] In the opening round of the postseason Croatia achieved an upset victory against regular-season champions York Region Shooters, winning 3–1 on goals on aggregate.

[139] In the championship finals Croatia successfully defended their title by defeating Montreal Impact Academy 1–0 with Vucemilovic-Grgic sealing the match for Toronto.

[141] On September 13, 2012 CBC News released an article with wiretap evidence which revealed a bribe in the order of €15,000 (CA$18,000) was paid to Antonijo Zupan, who was to share it with other players on his team.

[148][149] Toronto Croatia began reinvesting in their youth structure in 2013 by relaunching their reserve team, which secured the Second Division regular season title and were runners up in the championship.