| Tourney Name: | Leagues Cup |
| Year: | 2021 |
| Dates: | August 10 – September 22 |
| Num Teams: | 8 |
| Associations: | 2 |
| Champion Other: | León |
| Count: | 1 |
| Second Other: | Seattle Sounders FC |
| Matches: | 7 |
| Goals: | 21 |
| Top Scorer: |  Ángel Mena(3 goals) |
| Prevseason: | |
| Nextseason: | 2022 Showcase |
The 2021 Leagues Cup was the second edition of the Leagues Cup organized by Major League Soccer (MLS) and Liga MX. The tournament was originally planned to include sixteen teams but was later reduced to eight teams.
The 2020 edition of the tournament was canceled in May 2020 due to the ongoing COVID-19 pandemic in North America.[1] In the final at Allegiant Stadium, Paradise, Nevada, near Las Vegas, León defeated Seattle Sounders FC 3–2 to win their first title.
The top two Major League Soccer teams from each conference in the 2020 season who did not qualify for the 2021 CONCACAF Champions League qualified for the Leagues Cup.[2]
The top four Liga MX from the 2020–21 season aggregate table who are not competing in the 2021 CONCACAF Champions League semifinals or the 2021 Campeones Cup qualified for the Leagues Cup.[3]
 Sporting Kansas City | 1st, Western Conference | |
| Orlando City SC | 4th, Eastern Conference | |
| Seattle Sounders FC | 2nd, Western Conference | |
| 5th, Eastern Conference |
| León | 3rd, aggregate table | |
| UANL | 5th, aggregate table | |
| Santos Laguna | 6th, aggregate table | |
| UNAM | 7th, aggregate table |
On July 7, 2021, Major League Soccer and Liga MX announced the Leagues Cup schedule as well as the opening round matches.[4] [5]
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