The 2018 CONCACAF Champions League final was the final round of the 2018 CONCACAF Champions League, the championship for association football clubs in CONCACAF, representing North America, Central America, and the Caribbean. The 2018 edition was the tenth edition of the CONCACAF Champions League under its current name and first since being re-organized into a single-year tournament.

The final was contested in a two-legged series between Toronto FC from Canada and Guadalajara from Mexico. The first leg was hosted in Toronto on 27 April 2018, at BMO Field in Toronto, while the second leg was hosted in Guadalajara on 25 April 2018, at the Estadio Akron in Guadalajara. Guadalajara won the final 4–2 in a penalty shoot-out after the series was tied 3–3 on aggregate. As a result, they earned the right to represent CONCACAF at the 2018 FIFA Club World Cup, entering at the second round.

In the following table, final until 2008 were in the CONCACAF Champions' Cup era, since 2009 were in the CONCACAF Champions League era.

Toronto's BMO Field, with a seating capacity of 30,000, hosted the first leg of the final; it opened in 2007 and was renovated in 2016. The second leg took place in Guadalajara at the Estadio Akron, which opened in 2010 and has a capacity of 48,071. The two stadiums hosting the final were also candidates for the 2026 FIFA World Cup bid shared between Canada, Mexico, and the United States, although only Estadio Akron was eventually selected.

The CONCACAF Champions League was established in 2008 as the continental championship for football clubs in North America, Central America, and the Caribbean, succeeding the CONCACAF Champions' Cup. During its first nine editions, the Champions League consisted of a group stage in summer and autumn followed by a knockout stage during the following spring. Beginning with the 2018 edition of the tournament, the group stage was re-formed as the CONCACAF League and limited to Central American and Caribbean teams. The Champions League was shortened to a two-month knockout tournament between teams from North American and major Central American nations, as well as the winner of the CONCACAF League. The knockout tournament falls within the beginning of Major League Soccer's season, which operates on a summer schedule unlike other football leagues.

Toronto FC were appearing in their first final, and were the second Canadian team to have reached the final after Montreal Impact finished as runners-up in 2015. Only four teams from Major League Soccer (three American, one Canadian) on five occasions had managed to reach the final of the Champions League or the Champions' Cup. In addition to Montreal Impact, LA Galaxy (in 1997) and Real Salt Lake (in 2011) had previously lost in the final. D.C. United (in 1998) and LA Galaxy (in 2000) were the only two MLS teams to have won the competition, doing so during the Champions' Cup era. Of these five finals, four were against Mexican opponents, with only D.C. United managing to win.

Guadalajara had previously appeared in three finals, all in the Champions' Cup era. They won the inaugural edition in 1962, before finishing second the following year after withdrawing from the final. Guadalajara appeared in their next final 44 years later in 2007, losing to fellow Mexican club Pachuca on penalties. Mexican teams were the most successful in the history of the Champions League/Champions' Cup, with a total of 12 teams having won a combined 33 titles. Mexican teams had appeared in every final since 2005, and won every tournament since 2006. There had been a total of eleven all-Mexican finals, all since 2002, including the previous two finals.

Note: In all results below, the score of the finalist is given first (H: home; A: away).