| Swiss Cup | |
| Year: | 2020–21 |
| Country: | Switzerland |
| Num Teams: | 37 |
| Champions: | Luzern (3rd title) |
| Runner-Up: | St. Gallen |
| Prevseason: | 2019–20 |
| Defending Champions: | Young Boys |
| Date: | 29 August 2020 – 24 May 2021 |
The 2020–21 Swiss Cup was the 96th season of Switzerland's annual football cup competition. The competition began on 29 August 2020 with the first games of Round 1, and ended on 24 May 2021.
Young Boys were the title holders.
All teams from 2019–20 Super League and 2019–20 Challenge League. Due to the COVID-19 pandemic, only 18 slots (instead of 45) were allocated to teams from lower divisions. Those teams had to qualify through separate qualifying rounds within their leagues. Reserve teams and A-teams from Liechtenstein are not allowed in the competition, the latter only enter the 2020–21 Liechtenstein Cup.
| 2020–21 Super League 9 teams | 2020–21 Challenge League 10 teams | 2020–21 Promotion League 3 teams | 2020–21 1. Liga 4 teams | 2020–21 2. Liga Interregional 4 teams | 2020–21 Regional leagues 7 teams | |
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| Sixth tier
Seventh tier
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TH Title holders.
Teams from Super League and Challenge League received a bye in this round. In a match, the home advantage was granted to the team from the lower league, if applicable. Teams in bold continue to the next round of the competition.
|-| colspan="3" style="background:#9cc;"|29 August 2020|-| colspan="3" style="background:#9cc;"|30 August 2020|-| colspan="3" style="background:#9cc;"|31 August 2020|}
Teams engaged in UEFA competitions received a bye in this round. Teams from Super League were seeded. In a match, the home advantage was granted to the team from the lower league, if applicable. Teams in bold continue to the next round of the competition.
|-| colspan="3" style="background:#9cc;"|11 September 2020|-| colspan="3" style="background:#9cc;"|12 September 2020|-| colspan="3" style="background:#9cc;"|13 September 2020|-| colspan="3" style="background:#9cc;"|26 September 2020|}
In a match, the home advantage was granted to the team from the lower league, if applicable. Teams in bold continue to the next round of the competition.
|-|colspan="3" style="background-color:#99CCCC"|10 February 2021|-|colspan="3" style="background-color:#99CCCC"|17 February 2021|-|colspan="3" style="background-color:#99CCCC"|24 February 2021|-|colspan="3" style="background-color:#99CCCC"|10 March 2021|-|colspan="3" style="background-color:#99CCCC"|7 April 2021|-|colspan="3" style="background-color:#99CCCC"|8 April 2021|}
In a match, the home advantage was granted to the team from the lower league, if applicable. Teams in bold continue to the next round of the competition.
|-|colspan="3" style="background-color:#99CCCC"|6 April 2021|-|colspan="3" style="background-color:#99CCCC"|13 April 2021|-|colspan="3" style="background-color:#99CCCC"|14 April 2021|}
Teams in bold continue to the next round of the competition.
|-|colspan="3" style="background-color:#99CCCC"|4 May 2021|-|colspan="3" style="background-color:#99CCCC"|5 May 2021|}