| 1 Jan | Hong Kong Annual Orienteering Championships 2020 - Long Distance |  Hong Kong China | Asia | F | World Ranking Event | L | | |
| 9 Jan - 17 Jan | Oceania Orienteering Championships |  New Zealand | Oceania | F | Regional Championships
World Ranking Event | | | |
| 24 Jan | Beira Alta "O" Meeting |  Portugal | Europe | F | World Ranking Event | L | | |
| 6 Feb | Norte Alentejano "O" Meeting - Sprint | Portugal | Europe | F | World Ranking Event | S | | |
| 7 Feb | Norte Alentejano "O" Meeting - Middle | Portugal | Europe | F | World Ranking Event | M | | |
| 8 Feb - 28 Feb | [Online] UNOFFICIAL 7th WOC in Catching Features |  Switzerland | Europe | F | National Event | | | |
| 14 Feb | Portugal "O" Meeting 2021 | Portugal | Europe | F | World Ranking Event | L | | |
| 20 Feb | PIOM2021 | Portugal | Europe | F | World Ranking Event | M | | |
| 21 Feb | Maximus O Meeting |  Spain | Europe | F | World Ranking Event | M | | |
| 28 Feb | 33 COSTA CALIDA MURCIA | Spain | Europe | F | World Ranking Event | L | | |
| 12 Mar - 14 Mar | Euromeeting |  Czech Republic | Europe | F | World Ranking Event | | | |
| 20 Mar | Coppa Italia Sprint CO - 1^ prova |  Italy | Europe | F | World Ranking Event | S | 1/3 | |
| 21 Mar | Coppa Italia Sprint CO - 2^ prova | Italy | Europe | F | World Ranking Event | S | | |
| 27 Mar | Grodno Forest Day |  Belarus | Europe | F | World Ranking Event | M | | |
| 27 Mar | FIF Testløbsweekend, sprint |  Denmark | Europe | F | World Ranking Event | S | 19/3 | |
| 28 Mar | FIF Testløbsweekend, middle | Denmark | Europe | F | World Ranking Event | M | 19/3 | |
| 2 Apr | Australian 3-Days 2021 Sprint WRE |  Australia | Oceania | F | World Ranking Event | S | | |
| 3 Apr | New Zealand Long Distance Championship | New Zealand | Oceania | F | World Ranking Event | L | | |
| 3 Apr | Kurzemes Pavasaris (Middle) |  Latvia | Europe | F | World Ranking Event | M | | |
| 3 Apr | 3 jours de Pâques en Bourgogne |  France | Europe | F | World Ranking Event | M | | |
| 4 Apr | New Zealand Middle Distance Championship | New Zealand | Oceania | F | World Ranking Event | M | | |
| 4 Apr | Australian 3-Days 2021 Long WRE | Australia | Oceania | F | World Ranking Event | L | | |
| 4 Apr | 3 jours de Pâques en Bourgogne | France | Europe | F | World Ranking Event | L | | |
| 9 Apr | Russian Orienteering Cup |  Russian Federation | Europe | F | World Ranking Event | S | 2/4 | |
| 10 Apr | 4. National Event Swiss-O Middledistance |  Switzerland | Europe | F | World Ranking Event | M | | |
| 10 Apr | Mediterranean Championships in orienteering - Serbia open |  Serbia | Europe | F | World Ranking Event | M | 6/4 | |
| 10 Apr | Swedish League, #1 |  Sweden | Europe | F | World Ranking Event | M | | |
| 11 Apr | Bergen Sprint Camp |  Norway | Europe | F | World Ranking Event | S | | |
| 11 Apr | Mediterranean Championships in orienteering - Serbia open | Serbia | Europe | F | World Ranking Event | S | 15/3 | |
| 17 Apr | Open Grodno Cup | Belarus | Europe | F | World Ranking Event | L | | |
| 17 Apr | Nationale Sud-Ouest | France | Europe | F | World Ranking Event | M | | |
| 17 Apr | Solrenningen middle | Norway | Europe | F | World Ranking Event | M | | |
| 18 Apr | Open Grodno Cup | Belarus | Europe | F | World Ranking Event | S | | |
| 18 Apr | Tuplasprintti |  Finland | Europe | F | World Ranking Event | S | 10/4 | |
| 18 Apr | Nationale Sud-Ouest | France | Europe | F | World Ranking Event | L | | |
| 18 Apr | Solrenningen long | Norway | Europe | F | World Ranking Event | L | | |
| 18 Apr | Czech Cup | Czech Republic | Europe | F | World Ranking Event | M | 4/4 | |
| 23 Apr | Brazilian Orienteering Championships |  Brazil | South America | F | World Ranking Event | S | | |
| 24 Apr | Pavasario Taure (Spring Cup) |  Lithuania | Europe | F | World Ranking Event | M | 11/3 | |
| 24 Apr | 6. National Event Swiss-O Sprintdistance | Switzerland | Europe | F | World Ranking Event | S | | |
| 24 Apr | Trofej Beograda 2021 / Belgrade Trophy 2021 | Serbia | Europe | F | World Ranking Event | S | | |
| 24 Apr - 26 Apr | European Junior and Youth Orienteering Championships 2020 |  Hungary | Europe | F | Regional Championships | | | |
| 24 Apr | Brazilian Orienteering Championships | Brazil | South America | F | World Ranking Event | L | | |
| 24 Apr | National Orienteering League Middle WRE | Australia | Oceania | F | World Ranking Event | M | | |
| 25 Apr | Pavasario Taure (Spring Cup) | Lithuania | Europe | F | World Ranking Event | L | 11/3 | |
| 25 Apr | Brazilian Orienteering Championships | Brazil | South America | F | World Ranking Event | M | | |
| 1 May | May O-Days 2021 | Belarus | Europe | F | World Ranking Event | M | | |
| 3 May | Burabay 2021 International Multi-Day Competition |  Kazakhstan | Asia | F | World Ranking Event | M | 24/4 | |
| 3 May | Velikden Cup - Middle |  Bulgaria | Europe | F | World Ranking Event | M | | |
| 4 May | Burabay 2021 International Multi-Day Competition | Kazakhstan | Asia | F | World Ranking Event | M | 24/4 | |
| 8 May | Český pohár - sprint | Czech Republic | Europe | F | World Ranking Event | S | | |
| 8 May | Campionato Italiano CO Middle | Italy | Europe | F | World Ranking Event | M | 3/5 | |
| 9 May | Swiss Orienteering Championship Sprintdistance | Switzerland | Europe | F | World Ranking Event | S | | |
| 13 May - 16 May | Orienteering World Cup Round 1 with European Orienteering Championships 2021 | Switzerland | Europe | F | World Cup
Regional Championships | | | |
| 15 May | Metropolis of South East Europe 2021 | Serbia | Europe | F | World Ranking Event | M | | |
| 16 May | 9. National Event Swiss-O Sprintdistance | Switzerland | Europe | F | World Ranking Event | S | | |
| 22 May - 29 May | World Masters Orienteering Championships 2021 |  Japan | Asia | F | World Masters | | 10/4 | |
| 22 May | Coppa Italia Middle CO - 3^ prova | Italy | Europe | F | World Ranking Event | M | | |
| 22 May | Őrség Cup - Sprint | Hungary | Europe | F | World Ranking Event | S | | |
| 23 May | Coppa Italia Long CO - 4^ prova | Italy | Europe | F | World Ranking Event | L | | |
| 24 May | Őrség Cup - Middle | Hungary | Europe | F | World Ranking Event | M | | |
| 29 May | Baltic orienteering championship 2021 | Lithuania | Europe | F | World Ranking Event | L | | |
| 29 May | Campionato Italiano CO Long | Italy | Europe | F | World Ranking Event | L | | |
| 5 Jun | DM Sprint |  Sollerod OK | Europe | F | World Ranking Event | S | | |
| 5 Jun | Troféu Sudeste de Orientação 2021 | Brazil | South America | F | World Ranking Event | L | | |
| 6 Jun | Finnish Championship Middle distance | Finland | Europe | F | World Ranking Event | M | | |
| 11 Jun | FIF Sommerweekend, sprint |  FIF Hilleroed Orientering | Europe | F | World Ranking Event | S | | |
| 12 Jun | Helsinki O-Games, middle | Finland | Europe | F | World Ranking Event | M | | |
| 12 Jun | FIF Sommerweekend, middle | FIF Hilleroed Orientering | Europe | F | World Ranking Event | M | | |
| 12 Jun | TROFEO GUARDAMAR DEL SEGURA 2021 MIDDLE (WRE) | Spain | Europe | F | World Ranking Event | M | | |
| 12 Jun | Kurzemes Pavasaris (Middle) | Latvia | Europe | F | World Ranking Event | M | 6/6 | |
| 12 Jun | TROFEO GUARDAMAR DEL SEGURA 2021 SPRINT (WRE) | Spain | Europe | F | World Ranking Event | S | | |
| 13 Jun | FIF Sommerweekend, long | FIF Hilleroed Orientering | Europe | F | World Ranking Event | L | | |
| 13 Jun | TROFEO GUARDAMAR DEL SEGURA 2021 LONG (WRE) | Spain | Europe | F | World Ranking Event | L | | |
| 25 Jun | Norsk O-Festival sprint | Norway | Europe | F | World Ranking Event | S | | |
| 26 Jun | Norsk O-Festival mellom | Norway | Europe | F | World Ranking Event | M | | |
| 27 Jun | Norsk O-Festival lang | Norway | Europe | F | World Ranking Event | L | | |
| 30 Jun - 6 Jul | ISF World School Championship Orienteering 2021 | Serbia | Europe | F | Partner Event | | | |
| 3 Jul | Kapa 2021 3-days (Day2) | Latvia | Europe | F | World Ranking Event | M | | |
| 3 Jul - 9 Jul | Nokian Tyres World Orienteering Championships 2021 | Czech Republic | Europe | F | World Championships | | | |
| 11 Jul - 16 Jul | Junior World Orienteering Championships 2021 |  Turkey | Europe | F | Junior World Championships | | | |
| 15 Jul - 25 Jul | The World Games 2021 |  United States | North America | F | Partner Event | | | |
| 22 Jul | Swiss Orienteering Week 4. Etappe | Switzerland | Europe | F | World Ranking Event | L | | |
| 23 Jul | Swiss Orienteering Week 5. Etappe | Switzerland | Europe | F | World Ranking Event | M | | |
| 24 Jul | Grand Prix Romania |  Romania | Europe | F | World Ranking Event | M | | |
| 24 Jul - 27 Jul | EUSA - European University Games 2021 | Serbia | Europe | F | World Ranking Event | | | |
| 25 Jul | Grand Prix Romania | Romania | Europe | F | World Ranking Event | M | | |
| 30 Jul | Danish Spring, sprint |  Alleroed OK
 Farum OK
 OK Oest Birkeroed | Europe | F | World Ranking Event | S | | |
| 31 Jul | QARQARALY 2021 International Orienteering Tournament | Kazakhstan | Asia | F | World Ranking Event | M | | |
| 31 Jul | Danish Spring, middle | Alleroed OK
Farum OK
OK Oest Birkeroed | Europe | F | World Ranking Event | M | | |
| 31 Jul | Nationale Sud-Est | France | Europe | F | World Ranking Event | L | 15/7 | |
| 1 Aug | Danish Spring, long | Alleroed OK
Farum OK
OK Oest Birkeroed | Europe | F | World Ranking Event | L | | |
| 1 Aug | Nationale Sud-Est | France | Europe | F | World Ranking Event | M | 15/7 | |
| 6 Aug - 9 Aug | North American Orienteering Championships (Senior, Junior, Youth) | United States | North America | F | Regional Championships
World Ranking Event | | | |
| 7 Aug - 13 Aug | World Masters Orienteering Championships 2021 | Hungary | Europe | F | World Masters | | 3/5 | |
| 12 Aug - 15 Aug | Orienteering World Cup Round 2 | Sweden | Europe | F | World Cup
World Ranking Event | | | |
| 14 Aug | Siguldas Kauss (Middle) | Latvia | Europe | F | World Ranking Event | M | | |
| 15 Aug | Siguldas Kauss (Long) | Latvia | Europe | F | World Ranking Event | L | | |
| 19 Aug - 22 Aug | European Youth Orienteering Championships 2021 | Lithuania | Europe | F | Regional Championships | | | |
| 23 Aug - 29 Aug | Orienteering World Cup Round 2 with European Orienteering Championships 2021 | Russian Federation | Europe | F | Regional Championships
World Cup | | | |
| 27 Aug | Pomorze Sprint Cup 2021 |  Poland | Europe | F | World Ranking Event | S | | |
| 27 Aug | Zagreb Open 3rd Stage & Sprint distance Event for SEEOC and SEEMOC |  Croatia | Europe | F | World Ranking Event | | | |
| 28 Aug | Estonian Championships |  Estonia | Europe | F | World Ranking Event | S | | |
| 28 Aug | XIV Trofeo Quijotes – 5 días de España | Spain | Europe | F | World Ranking Event | M | | |
| 28 Aug | Zagreb Open 4th Stage & Long distance Event for SEEOC and SEEMOC | Croatia | Europe | F | World Ranking Event | | | |
| 28 Aug | DM Mellem / Danish Championships, Middle Distance |  OK Snab | Europe | F | World Ranking Event | M | 14/8 | |
| 29 Aug | Pomorze Sprint Cup 2021 | Poland | Europe | F | World Ranking Event | S | | |
| 4 Sep | Finnish Championships in Long Distance | Finland | Europe | F | World Ranking Event | L | | |
| 4 Sep | Campionato Italiano CO Sprint | Italy | Europe | F | World Ranking Event | S | | |
| 4 Sep | Czech Cup long | Czech Republic | Europe | F | World Ranking Event | L | | |
| 5 Sep | Czech Cup middle | Czech Republic | Europe | F | World Ranking Event | M | | |
| 11 Sep | Swiss Orienteering Championship Middledistance | Switzerland | Europe | F | World Ranking Event | M | | |
| 11 Sep | Finnish Championships in Sprint | Finland | Europe | F | World Ranking Event | S | 31/5 | |
| 12 Sep | DM Lang |  Herning OK | Europe | F | World Ranking Event | L | | |
| 12 Sep | Swiss Orienteering Championship Longdistance | Switzerland | Europe | F | World Ranking Event | L | | |
| 25 Sep | Australian Sprint Distance Championships | Australia | Oceania | F | World Ranking Event | S | | |
| 25 Sep | 11. National Event Swiss-O Middledistance | Switzerland | Europe | F | World Ranking Event | L | | |
| 25 Sep | Slovak Orienteering Championship – Middle distance |  Slovakia | Europe | F | World Ranking Event | M | | |
| 26 Sep | Australian Middle Distance Orienteering Championships | Australia | Oceania | F | World Ranking Event | M | | |
| 26 Sep | 12. National Event Swiss-O | Switzerland | Europe | F | World Ranking Event | L | | |
| 30 Sep - 3 Oct | Orienteering World Cup Round 3 - Final | Italy | Europe | F | World Cup | | | |
| 2 Oct | Australian Long Distance Orienteering Championships | Australia | Oceania | F | World Ranking Event | L | | |
| 9 Oct | Hungarian Orienteering Championship - Long distance | Hungary | Europe | F | World Ranking Event | L | | |
| 10 Oct | 25mannamedeln | Sweden | Europe | F | World Ranking Event | M | | |
| 16 Oct | Coppa Italia Middle CO Finale | Italy | Europe | F | World Ranking Event | M | | |
| 23 Oct | The Japan Orienteering Championships – Middle distance | Japan | Asia | F | World Ranking Event | M | | |
| 23 Oct | Swedish League, #9 | Sweden | Europe | F | World Ranking Event | L | | |
| 23 Oct | WOC2022 WRE | Denmark | Europe | F | World Ranking Event | S | | |
| 24 Oct | The Japan Orienteering Championships – Long distance | Japan | Asia | F | World Ranking Event | L | | |
| 30 Oct | 2 Days of North-West Veluwe 2021 |  Netherlands | Europe | F | | M | 17/10 | |
| 30 Oct | Championnat de France | France | Europe | F | World Ranking Event | S | | |
| 31 Oct | Copa de los Países Latinos - XXVI Latin Cup 2021 - Middle distance | Spain | Europe | F | World Ranking Event | M | | |
| 1 Nov | Copa de los Países Latinos - XXVI Latin Cup 2021 - Sprint distance | Spain | Europe | F | World Ranking Event | S | | |
| 13 Nov | Troféu Cerrado de Orientação 2021 | Brazil | South America | F | World Ranking Event | L | | |
| 4 Dec | 33 COSTA CÁLIDA MURCIA | Spain | Europe | F | World Ranking Event | L | | |
| 23 Dec - 26 Dec | Asian Junior and Youth Orienteering Championships 2021 | Hong Kong China | Asia | F | Regional Championships | | | |
