| 11 Jan | [Online] TOREMOOS |  Italy | Europe | T | | L | | |
| 14 Jan | Cup of Russia |  Russian Federation | Europe | S | World Ranking Event | L | |  |
| 16 Jan | Cup of Russia | Russian Federation | Europe | S | World Ranking Event | S | | |
| 30 Jan | VM uttak og NM-langdistanse |  Norway | Europe | S | World Ranking Event | M | | |
| 31 Jan | VM uttak mellomdistanse | Norway | Europe | S | World Ranking Event | L | | |
| 1 Feb | [Online] Central European TORUS Training Week 2021 |  Slovakia | Europe | T | National Event | L | | |
| 8 Feb - 28 Feb | [Online] UNOFFICIAL 7th WOC in Catching Features |  Switzerland | Europe | F | National Event | | | |
| 13 Feb | NM mellomdistanse | Norway | Europe | S | World Ranking Event | M | | |
| 14 Feb | Campionato Italiano SCIO Long | Italy | Europe | S | World Ranking Event | L | | |
| 14 Feb | Norgescup sprint | Norway | Europe | S | World Ranking Event | S | | |
| 22 Feb - 28 Feb | European Youth Ski Orienteering Championships 2021 |  Estonia | Europe | S | Regional Championships | | | |
| 22 Feb - 28 Feb | World Ski Orienteering Championships 2021 | Estonia | Europe | S | World Championships
World Ranking Event | | | |
| 22 Feb - 28 Feb | Junior World Ski Orienteering Championships 2021 | Estonia | Europe | S | Junior World Championships
World Ranking Event | | | |
| 20 Mar | Coppa Italia Sprint CO - 1^ prova | Italy | Europe | F | World Ranking Event | S | | |
| 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 | | |
| 28 Mar | FIF Testløbsweekend, middle | Denmark | Europe | F | World Ranking Event | M | | |
| 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 | | |
| 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 | | |
| 9 Apr | Russian Orienteering Cup | Russian Federation | Europe | F | World Ranking Event | S | | |
| 10 Apr | Swedish League, #1 |  Sweden | Europe | F | World Ranking Event | M | | |
| 17 Apr | Open Grodno Cup | Belarus | Europe | F | World Ranking Event | L | | |
| 17 Apr | Rak TrailO 2021 |  Slovenia | Europe | T | World Ranking Event | P | | |
| 18 Apr | Open Grodno Cup | Belarus | Europe | F | World Ranking Event | S | | |
| 18 Apr | Tuplasprintti |  Finland | Europe | F | World Ranking Event | S | | |
| 18 Apr | Rak TrailO 2021 | Slovenia | Europe | T | World Ranking Event | P | | |
| 24 Apr | Trofej Beograda 2021 / Belgrade Trophy 2021 |  Serbia | Europe | F | World Ranking Event | S | | |
| 24 Apr | National Orienteering League Middle WRE | Australia | Oceania | F | World Ranking Event | M | | |
| 1 May | May O-Days 2021 | Belarus | Europe | F | World Ranking Event | M | | |
| 8 May | Campionato Italiano CO Middle | Italy | Europe | F | World Ranking Event | M | | |
| 8 May | Český pohár - sprint |  Czech Republic | Europe | F | World Ranking Event | S | | |
| 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 | Regional Championships
World Cup | | | |
| 16 May | Metropolis of South East Europe 2021 | Serbia | Europe | F | World Ranking Event | M | | |
| 16 May | TRaVilO | Finland | Europe | T | World Ranking Event | T | | |
| 16 May | TRaVilO | Finland | Europe | T | World Ranking Event | P | | |
| 22 May | Finnish MTBO Championship Sprint | Finland | Europe | M | World Ranking Event | S | | |
| 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 | Finnish MTBO Championship Long distance | Finland | Europe | M | World Ranking Event | L | | |
| 23 May | Coppa Italia Long CO - 4^ prova | Italy | Europe | F | World Ranking Event | L | | |
| 23 May | Őrség Cup - Middle | Hungary | Europe | F | World Ranking Event | M | | |
| 28 May | Capital Cup / UKR Cup |  Ukraine | 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 | | |
| 6 Jun | Finnish Championship Middle distance | Finland | Europe | F | World Ranking Event | M | | |
| 10 Jun - 18 Jun | Junior World MTB Orienteering Championships 2021 | Finland | Europe | M | Junior World Championships | | | |
| 10 Jun - 18 Jun | World MTB Orienteering Championships 2021 and CX80 MTBO World Cup | Finland | Europe | M | World Cup
World Ranking Event
World Championships | | | |
| 11 Jun | FIF Sommerweekend, sprint | Denmark | Europe | F | World Ranking Event | S | | |
| 12 Jun | Helsinki O-Games, middle | Finland | Europe | F | World Ranking Event | M | | |
| 12 Jun | FIF Sommerweekend, middle | Denmark | Europe | F | World Ranking Event | M | | |
| 12 Jun | TROFEO GUARDAMAR DEL SEGURA 2021 MIDDLE (WRE) |  Spain | Europe | F | World Ranking Event | M | | |
| 12 Jun | Hungarian Orienteering Championship - Middle distance | Hungary | Europe | F | World Ranking Event | M | | |
| 12 Jun | TROFEO GUARDAMAR DEL SEGURA 2021 SPRINT (WRE) | Spain | Europe | F | World Ranking Event | S | | |
| 13 Jun | FIF Sommerweekend, long | Denmark | Europe | F | World Ranking Event | L | | |
| 13 Jun | TROFEO GUARDAMAR DEL SEGURA 2021 LONG (WRE) | Spain | Europe | F | World Ranking Event | L | | |
| 27 Jun | World cup test | Sweden | Europe | F | World Ranking Event | M | | |
| 30 Jun | World cup test | Sweden | Europe | F | World Ranking Event | L | | |
| 3 Jul - 9 Jul | Nokian Tyres World Orienteering Championships 2021 | Czech Republic | Europe | F | World Championships | | | |
| 4 Jul | MTBO 5 Days, 3rd stage - long | Czech Republic | Europe | M | World Ranking Event | L | | |
| 5 Jul | MTBO 5 Days, 4th stage - middle | Czech Republic | Europe | M | World Ranking Event | M | | |
| 10 Jul | Austrian MTBOdays 2021 – Sprint |  Austria | Europe | M | World Ranking Event | S | | |
| 11 Jul | Austrian MTBOdays 2021 – Long | Austria | Europe | M | World Ranking Event | L | | |
| 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 | | |
| 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 | Kapa 2021 3-days (Day2) |  Latvia | Europe | F | World Ranking Event | M | | |
| 31 Jul | Nationale Sud-Est |  France | Europe | F | World Ranking Event | L | | |
| 31 Jul | Danish Spring, middle | Alleroed OK
Farum OK
OK Oest Birkeroed | Europe | F | World Ranking Event | M | | |
| 1 Aug | Championnat de France | France | Europe | F | World Ranking Event | M | | |
| 1 Aug | Danish Spring, long | Alleroed OK
Farum OK
OK Oest Birkeroed | Europe | F | World Ranking Event | L | | |
| 6 Aug | Scottish 6 Days, Day 5 |  Great Britain | Europe | F | World Ranking Event | L | | |
| 7 Aug | Fin TrailO 2021 | Finland | Europe | T | World Ranking Event | P | | |
| 7 Aug - 13 Aug | World Masters Orienteering Championships 2021 | Hungary | Europe | F | World Masters | | | |
| 8 Aug | Fin TrailO 2021 | Finland | Europe | T | World Ranking Event | P | | |
| 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 | | | |
| 26 Aug | Zagreb Open 2nd Stage & Middle distance Event for SEEOC and SEEMOC |  OK Vihor | Europe | F | World Ranking Event | M | | |
| 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 | OK Vihor | 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 | OK Vihor | Europe | F | World Ranking Event | L | | |
| 28 Aug | DM Mellem / Danish Championships, Middle Distance |  OK Snab | Europe | F | World Ranking Event | M | | |
| 28 Aug | Estonian Championships | Estonia | Europe | F | World Ranking Event | S | | |
| 29 Aug | Pomorze Sprint Cup 2021 | Poland | Europe | F | World Ranking Event | S | | |
| 4 Sep | Baltic coast | Russian Federation | Europe | T | World Ranking Event | P | | |
| 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 | Finnish Championships in Long Distance | Finland | Europe | F | World Ranking Event | L | | |
| 5 Sep - 10 Sep | Junior World Orienteering Championships 2021 |  Turkey | Europe | F | Junior World Championships | | | |
| 5 Sep | Czech Cup middle | Czech Republic | Europe | F | World Ranking Event | M | | |
| 8 Sep - 14 Sep | [Online] World Orienteering Day TORUS Series | Czech Republic | Europe | T | | T | | |
| 11 Sep | Pavasario Taure (Spring Cup) | Lithuania | Europe | F | World Ranking Event | M | | |
| 11 Sep | Campionato Italiano MTBO Long | Italy | Europe | M | World Ranking Event | L | | |
| 11 Sep - 17 Sep | ISF World School Championship Orienteering 2021 | Serbia | Europe | F | Partner Event | | | |
| 11 Sep - 19 Sep | ISF U15 World School Sport Games 2021 | Serbia | Europe | F | Partner Event | | | |
| 11 Sep | Finnish Championships in Sprint | Finland | Europe | F | World Ranking Event | S | | |
| 11 Sep | Swiss Orienteering Championship Middledistance | Switzerland | Europe | F | World Ranking Event | M | | |
| 11 Sep | Falco Cup 2021 | Lithuania | Europe | T | World Ranking Event | T | | |
| 12 Sep | Pavasario Taure (Spring Cup) | Lithuania | Europe | F | World Ranking Event | L | | |
| 12 Sep | Coppa Italia MTBO - Sprint | Italy | Europe | M | World Ranking Event | S | | |
| 12 Sep | Falco Cup 2021 | Lithuania | Europe | T | World Ranking Event | P | | |
| 12 Sep | Swiss Orienteering Championship Longdistance | Switzerland | Europe | F | World Ranking Event | L | | |
| 18 Sep | Popovo Cup |  Bulgaria | Europe | M | World Ranking Event | L | | |
| 18 Sep | Hungarian Orienteering Championship - Sprint | Hungary | Europe | F | World Ranking Event | S | | |
| 18 Sep | Nordic Match - day 1 | Norway | Europe | T | World Ranking Event | P | | |
| 19 Sep | Shtraklevo Cup | Bulgaria | Europe | M | World Ranking Event | S | | |
| 19 Sep | DM Lang |  Herning OK | Europe | F | World Ranking Event | L | | |
| 19 Sep | Nordic Match - day 2 | Norway | Europe | T | World Ranking Event | P | | |
| 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 | 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 | | | |
| 6 Oct - 10 Oct | European Junior and Youth MTB Orienteering Championships 2021 |  Portugal | Europe | M | Regional Championships | | | |
| 6 Oct - 10 Oct | World Masters MTB Orienteering Championships 2021 | Portugal | Europe | M | | | | |
| 7 Oct - 10 Oct | European MTB Orienteering Championships & CX80 MTBO World Cup Final | Portugal | Europe | M | Regional Championships
World Cup | | | |
| 9 Oct | Mediterranean Championships in orienteering - Serbia open | Serbia | Europe | F | World Ranking Event | M | | |
| 9 Oct | Hungarian Orienteering Championship - Long distance | Hungary | Europe | F | World Ranking Event | L | | |
| 10 Oct | Mediterranean Championships in orienteering - Serbia open | Serbia | Europe | F | World Ranking Event | S | | |
| 16 Oct | Coppa Italia Middle CO Finale | Italy | Europe | F | World Ranking Event | M | | |
| 17 Oct | Colombian Orienteering Championships |  Colombia | South America | F | World Ranking Event | M | | |
| 18 Oct | Colombian Orienteering Championships | Colombia | South America | F | World Ranking Event | S | | |
| 23 Oct | The Japan Orienteering Championships – Middle distance |  Japan | Asia | F | World Ranking Event | M | | |
| 23 Oct | Slovak TrailO Weekend 2021 | Slovakia | Europe | T | World Ranking Event | T | | |
| 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 | | |
| 24 Oct | Slovak TrailO Weekend 2021 | Slovakia | Europe | T | World Ranking Event | P | | |
| 24 Oct | WOC2022 WRE | Denmark | Europe | F | World Ranking Event | S | | |
| 30 Oct | Championnat de France | France | Europe | F | World Ranking Event | S | | |
| 30 Oct | Copa de los Países Latinos - XXVI Latin Cup 2021 - Long distance | Spain | Europe | F | World Ranking Event | M | | |
| 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 | | |
| 6 Nov | Rome Orienteering Festival - TempO | Italy | Europe | T | World Ranking Event | T | | |
| 7 Nov | Rome Orienteering Festival - PreO | Italy | Europe | T | World Ranking Event | P | | |
| 12 Nov | Brazilian Orienteering Championships |  Brazil | South America | F | World Ranking Event | S | | |
| 13 Nov | Brazilian Orienteering Championships | Brazil | South America | F | World Ranking Event | L | | |
| 14 Nov | Brazilian Orienteering Championships | Brazil | South America | F | World Ranking Event | M | | |
| 4 Dec | First Snow Competiton 2021 | Finland | Europe | S | World Ranking Event | M | | |
| 5 Dec | 33 COSTA CÁLIDA MURCIA | Spain | Europe | F | World Ranking Event | L | | |
| 5 Dec | First Snow Competiton 2021 | Finland | Europe | S | World Ranking Event | M | | |
| 11 Dec | 9. International Ski Orienteering Meeting |  Germany | Europe | S | World Ranking Event | M | | |
| 12 Dec | 9. International Ski Orienteering Meeting | Germany | Europe | S | World Ranking Event | L | | |
| 18 Dec | Hong Kong Annual Trail Orienteering Championships 2021 |  Hong Kong China | Asia | T | World Ranking Event | P | | |
| 19 Dec | Hong Kong Annual Trail Orienteering Championships 2021 | Hong Kong China | Asia | T | World Ranking Event | T | | |
| 29 Dec | Swiss Championships Long Distance |  SkiO Swiss | Europe | S | World Ranking Event | L | | |
| 30 Dec | 4th competition Swiss SkiO Cup 2022 | SkiO Swiss | Europe | S | World Ranking Event | S | | |
| 30 Dec | Christmas Sprint | Denmark | Europe | F | World Ranking Event | S | | |
