| 25 Dec - 1 Jan | 香港週年定向錦標賽 2020 Annual Orienteering Championships 2020 |  Hong Kong | Hong Kong | | int | | M | | |
| 3 Jan | 色級定向活動 2020/2021 Colour-Coded Event 2020/2021 |  Orienteering Association of Hong Kong | Hong Kong | | loc | | M | | |
| 10 Jan | 香港定向排名聯賽 2021 (短距離) Hong Kong Orienteering Ranking League 2021 (Sprint) |  Apex Action
Orienteering Association of Hong Kong | Hong Kong | | club | | S | | |
| 17 Jan | Y2Y 定向錦標賽 2021 Y2Y Orienteering Championships 2021 |  Y2Y Orienteering Development and Training Centre | Hong Kong | | club | | M | | |
| 23 Jan | 分區學界野外定向錦標賽 2020/2021 Joint School District Orienteering Championships 2020/2021 | Orienteering Association of Hong Kong | Hong Kong | | loc | | M | | |
| 24 Jan | NPV x Kakato Men Dog Orienteering Race 2021 |  Hong Kong Orienteering Club | Hong Kong | | loc | T | M | | |
| 24 Jan | 野外定向接力賽 2021 - 大嶼山昂坪 Orienteering Relay Event 2021 - Ngong Ping, Lantau |  MOPC
Orienteering Association of Hong Kong | Hong Kong | | club | R | M | | |
| 30 Jan - 31 Jan | AYP Rogaine Charity Race 2021 |  The Hong Kong Award for Young People | Hong Kong | | loc | T | L | | |
| 6 Feb | 學界野外定向錦標賽 - 決賽 2020/2021 Joint School Orienteering Championships 2020/2021 - Final | Orienteering Association of Hong Kong | Hong Kong | | loc | | M | | |
| 10 Feb - 16 Feb | 2021年 香港野外定向會 x 台灣定向運動協會 網上沿徑定向（精確賽）系列 第一回 HKOC x TWOA Online TrailO (PreO) Series 2021 Series 1 | Hong Kong Orienteering Club | Hong Kong | FT | loc | | P | | |
| 28 Feb - 8 Mar | Pro-Active 聖誕三連環 2020 Pro-Active X'Mas 3 Days 2020 |  Pro-Active Orienteering Club | Hong Kong | | club | | S | | |
| 28 Feb | 香港定向排名聯賽 2021 (中/長距離) Hong Kong Orienteering Ranking League 2021 (Middle/Long) | Orienteering Association of Hong Kong | Hong Kong | | club | | M | | |
| 7 Mar | 香港定向排名聯賽 2021 (短距離) - 大坑東 Hong Kong Orienteering Ranking League 2021 (Sprint) - Tai Hang Tung |  Akinalliance
Orienteering Association of Hong Kong | Hong Kong | | club | | S | | |
| 14 Mar | 色級定向活動 2020/2021 Colour-Coded Event 2020/2021 | Orienteering Association of Hong Kong | Hong Kong | | club | | M | | |
| 14 Mar | Y2Y定向錦標賽2021 | Y2Y Orienteering Championships 2021 | Y2Y Orienteering Development and Training Centre | Hong Kong | | club | | M | | |
| 21 Mar | 自助手機色級定向活動 - 鴨仔山 Self Service Mobile Apps Colour Coded Orienteering Event - Duckling Hill | Orienteering Association of Hong Kong | Hong Kong | | loc | | M | |  |
| 21 Mar | 第二十四屆白理義先生紀念賽 - 鶴藪 24th Mr. Paddy Birney Memorial Score Event - Hok Tau |  A123
Orienteering Association of Hong Kong | Hong Kong | | club | T | M | | |
| 28 Mar | NVii Y2Y 公園定向巡迴賽 2020 第九站 NVii Y2Y Park Orienteering Tournament 2020 Stage 9 | Y2Y Orienteering Development and Training Centre | Hong Kong | | club | | S | |  |
| 1 Apr - 7 Apr | 2021年 香港野外定向會 x 台灣定向運動協會 網上沿徑定向（精確賽）系列 第二回 HKOC x TWOA Online TrailO (PreO) Series 2021 Series 2 | Hong Kong Orienteering Club | Hong Kong | T | loc | | P | | |
| 10 Apr | NVii Y2Y 公園定向巡迴賽 2020 第十站 NVii Y2Y Park Orienteering Tournament 2020 Stage 10 | Y2Y Orienteering Development and Training Centre | Hong Kong | | club | | S | | |
| 24 Apr | NVii Y2Y 公園定向巡迴賽 2020 第十一站 NVii Y2Y Park Orienteering Tournament 2020 Stage 11 | Y2Y Orienteering Development and Training Centre | Hong Kong | | club | | S | | |
| 1 May | NVii Y2Y 公園定向巡迴賽 2020 第十二站 NVii Y2Y Park Orienteering Tournament 2020 Stage 12 | Y2Y Orienteering Development and Training Centre | Hong Kong | | club | | S | | |
| 2 May | HKOC GPS Orienteering Series Stage 1 - Tai Tong | Hong Kong Orienteering Club | Hong Kong | | loc | | M | | |
| 8 May | HKOC GPS Orienteering Series Stage 2 - Tai Po Waterfront Park | Hong Kong Orienteering Club | Hong Kong | | loc | | S | | |
| 16 May | HKOC GPS Orienteering Series Stage 3 - Ngau Liu | Hong Kong Orienteering Club | Hong Kong | | loc | | M | | |
| 19 May | NVii Y2Y 公園定向巡迴賽 2020 第八站 NVii Y2Y Park Orienteering Tournament 2020 Stage 8 | Y2Y Orienteering Development and Training Centre | Hong Kong | | club | | S | | |
| 22 May | HKOC GPS Orienteering Series Stage 4 - Yuen Long Park | Hong Kong Orienteering Club | Hong Kong | | loc | | S | | |
| 30 May | HKOC GPS Orienteering Series Stage 5 - Rotary Park | Hong Kong Orienteering Club | Hong Kong | | loc | | M | | |
| 5 Jun | HKOC GPS Orienteering Series Stage 6 - Victoria Park | Hong Kong Orienteering Club | Hong Kong | | loc | | S | | |
| 10 Jun - 16 Jun | 2021年 香港野外定向會 x 台灣定向運動協會 網上沿徑定向（精確賽）系列 第三回 HKOC x TWOA Online TrailO (PreO) Series 2021 Series 3 | Hong Kong Orienteering Club | Hong Kong | T | loc | | P | | |
| 1 Jul | Pro-Active 短距離系列賽 2021 第一站 Pro-Active Sprint Orienteering 2021 Stage 1 | Pro-Active Orienteering Club | Hong Kong | | loc | | S | | |
| 10 Jul | 定向圖 • 出迷宫 @中環夏誌 O For All @SummerFest | Orienteering Association of Hong Kong | Hong Kong | | loc | | S | | |
| 11 Jul | Pro-Active 短距離系列賽 2021 第二站 Pro-Active Sprint Orienteering 2021 Stage 2 | Pro-Active Orienteering Club | Hong Kong | | loc | | S | | |
| 17 Jul | HKOC GPS Orienteering Series 2 Stage 1 - Carpenter Road Park & Kowloon Walled City Park | Hong Kong Orienteering Club | Hong Kong | | loc | | S | | |
| 25 Jul | Str8 x TerraX Sprint Orienteering Tournament 2021 Round 1 |  TerraX Sports Club
Y2Y Orienteering Development and Training Centre | Hong Kong | | loc | | S | | |
| 25 Jul | HKOC GPS Orienteering Series 2 Stage 2 - Ngau Liu | Hong Kong Orienteering Club | Hong Kong | | loc | | M | | |
| 31 Jul | HKOC GPS Orienteering Series 2 Stage 3 - Sha Tin Central Park & Shing Mun River Promenade | Hong Kong Orienteering Club | Hong Kong | | loc | | S | 27/7 | |
| 7 Aug | Str8 x TerraX Sprint Orienteering Tournament 2021 Round 2 | TerraX Sports Club
Y2Y Orienteering Development and Training Centre | Hong Kong | | loc | | S | 2/8 | |
| 7 Aug | Pro-Active 短距離系列賽 2021 第三站 Pro-Active Sprint Orienteering 2021 Stage 3 | Pro-Active Orienteering Club | Hong Kong | | loc | | S | | |
| 8 Aug | HKOC GPS Orienteering Series 2 Stage 4 - Rotary Park | Hong Kong Orienteering Club | Hong Kong | | loc | | M | 4/8 | |
| 14 Aug | HKOC GPS Orienteering Series 2 Stage 5 - Tin Shui Wai Park & Tin Shui Road Park | Hong Kong Orienteering Club | Hong Kong | | loc | | S | 10/8 | |
| 14 Aug | Y2Y 公園定向巡迴賽 2021 第一站 Y2Y Park Orienteering Tournament 2021 Stage 1 | Y2Y Orienteering Development and Training Centre | Hong Kong | | loc | | S | | |
| 21 Aug | HKOC GPS Orienteering Series 2 Stage 6 - Cheung Chau | Hong Kong Orienteering Club | Hong Kong | | loc | | M | 17/8 | |
| 22 Aug | Pro-Active 短距離系列賽 2021 第四站 Pro-Active Sprint Orienteering 2021 Stage 4 | Pro-Active Orienteering Club | Hong Kong | | loc | | S | | |
| 25 Aug - 31 Aug | 2021年 香港野外定向會 x 台灣定向運動協會 網上沿徑定向（精確賽）系列 第四回 HKOC x TWOA Online TrailO (PreO) Series 2021 Series 4 | Hong Kong Orienteering Club | Hong Kong | T | loc | | P | 24/8* | |
| 28 Aug | Y2Y黑夜定向巡迴賽2021 第一站 | Y2Y Night Orienteering Tournament 2021 Stage 1 | Y2Y Orienteering Development and Training Centre | Hong Kong | | loc | T | M | | |
| 29 Aug | Y2Y 公園定向巡迴賽 2021 第二站 Y2Y Park Orienteering Tournament 2021 Stage 2 | Y2Y Orienteering Development and Training Centre | Hong Kong | | loc | | S | | |
| 5 Sep | 香港周年沿徑定向入圍賽 (速決賽) Hong Kong Annual Trail Orienteering Qualification (TempO) | MOPC
Orienteering Association of Hong Kong | Hong Kong | T | loc | | T | 29/8 | |
| 5 Sep | 山海公城 短途定向系列 2021 第一站「山」MOPC Sprint Orienteering Series 2021 Stage 1 "Mountain" | MOPC | Hong Kong | | loc | | S | | |
| 12 Sep | 香港周年沿徑定向入圍賽 (精確賽) Hong Kong Annual Trail Orienteering Qualification (PreO) | Orienteering Association of Hong Kong
 Orienteering Seeds HK | Hong Kong | T | loc | | P | 5/9 | |
| 12 Sep | Trimtex x OS x WOD FootO Training | Orienteering Seeds HK | Hong Kong | | club | | M | 11/9 | |
| 18 Sep | Str8 x TerraX Sprint Orienteering Tournament 2021 Round 3 | TerraX Sports Club
Y2Y Orienteering Development and Training Centre | Hong Kong | | loc | | S | 13/9 | |
| 22 Sep | Y2Y 公園定向巡迴賽 2021 第三站 Y2Y Park Orienteering Tournament 2021 Stage 3 | Y2Y Orienteering Development and Training Centre | Hong Kong | | loc | | S | | |
| 22 Sep | Pro-Active 短距離系列賽 2021 第五站 Pro-Active Sprint Orienteering 2021 Stage 5 | Pro-Active Orienteering Club | Hong Kong | | loc | | S | | |
| 25 Sep | Y2Y黑夜定向巡迴賽2021 第二站 | Y2Y Night Orienteering Tournament 2021 Stage 2 | Y2Y Orienteering Development and Training Centre | Hong Kong | | loc | T | M | | |
| 26 Sep | 山海公城 短途定向系列 2021 第二站「海」MOPC Sprint Orienteering Series 2021 Stage 2 "Ocean" | MOPC | Hong Kong | | loc | | S | | |
| 2 Oct | Y2Y 公園定向巡迴賽 2021 第四站 Y2Y Park Orienteering Tournament 2021 Stage 4 | Y2Y Orienteering Development and Training Centre | Hong Kong | | loc | | S | | |
| 8 Oct - 14 Oct | 2021年 香港野外定向會 x 台灣定向運動協會 網上沿徑定向（精確賽）系列 第五回 HKOC x TWOA Online TrailO (PreO) Series 2021 Series 5 | Hong Kong Orienteering Club | Hong Kong | T | loc | | P | 8/10* | |
| 9 Oct | Y2Y黑夜定向巡迴賽2021 第三站 | Y2Y Night Orienteering Tournament 2021 Stage 3 | Y2Y Orienteering Development and Training Centre | Hong Kong | | loc | T | M | | |
| 14 Oct | Pro-Active 短距離系列賽 2021 第六站 Pro-Active Sprint Orienteering 2021 Stage 6 | Pro-Active Orienteering Club | Hong Kong | | loc | | S | | |
| 16 Oct | Str8 x TerraX Sprint Orienteering Tournament 2021 Round 4 | TerraX Sports Club
Y2Y Orienteering Development and Training Centre | Hong Kong | | loc | | S | 11/10 | |
| 17 Oct | 山海公城 短途定向系列 2021 第三站「公」MOPC Sprint Orienteering Series 2021 Stage 3 "Park" | MOPC | Hong Kong | | loc | | S | | |
| 23 Oct | Y2Y 公園定向巡迴賽 2021 第五站 Y2Y Park Orienteering Tournament 2021 Stage 5 | Y2Y Orienteering Development and Training Centre | Hong Kong | | loc | | S | | |
| 30 Oct | HKOC Night Orienteering Event 2021/2022 cum Hong Kong Night Open Orienteering Event | Hong Kong Orienteering Club | Hong Kong | | loc | | M | | |
| 6 Nov | Str8 x TerraX Sprint Orienteering Tournament 2021 Round 5 | TerraX Sports Club
Y2Y Orienteering Development and Training Centre | Hong Kong | | loc | | S | 1/11 | |
| 6 Nov | Pro-Active 短距離系列賽 2021 第七站 Pro-Active Sprint Orienteering 2021 Stage 7 | Pro-Active Orienteering Club | Hong Kong | | loc | | S | | |
| 7 Nov | 山海公城 短途定向系列 2021 第四站「城」MOPC Sprint Orienteering Series 2021 Stage 4 "City" | MOPC | Hong Kong | | loc | | S | | |
| 13 Nov - 14 Nov | AYP Rogaine Charity Race 2021 | The Hong Kong Award for Young People | Hong Kong | | loc | T | L | | |
| 14 Nov | 生態捍衛戰 Eco-Rangers 2021 | Hong Kong Orienteering Club | Hong Kong | | loc | T | M | | |
| 20 Nov | Y2Y 公園定向巡迴賽 2021 第六站 Y2Y Park Orienteering Tournament 2021 Stage 6 | Y2Y Orienteering Development and Training Centre | Hong Kong | | loc | | S | | |
| 20 Nov | Pro-Active 短距離系列賽 2021 第八站 Pro-Active Sprint Orienteering 2021 Stage 8 | Pro-Active Orienteering Club | Hong Kong | | loc | | S | | |
| 28 Nov | 仁愛堂野外定向慈善賽 Yan Oi Tong Charity Orienteering Race | Hong Kong Orienteering Club | Hong Kong | | loc | | M | | |
| 4 Dec | Str8 x TerraX Sprint Orienteering Tournament 2021 Round 6 | TerraX Sports Club
Y2Y Orienteering Development and Training Centre | Hong Kong | | loc | | S | 29/11 | |
| 5 Dec | Pro-Active 短距離系列賽 2021 總決賽 Pro-Active Sprint Orienteering 2021 Final | Pro-Active Orienteering Club | Hong Kong | | loc | | S | | |
| 12 Dec | HKOC NPV Men-Dog Orienteering Competition 2021 | Hong Kong Orienteering Club | Hong Kong | | loc | | M | | |
| 17 Dec - 19 Dec | #AsiaCityRace #HKG - Hong Kong City Race |  Metropolitan Orienteering Club | Hong Kong | | club | | L | | |
| 18 Dec | 2021香港周年沿徑定向錦標賽(精確賽)暨世界排位賽 Hong Kong Annual Trail Orienteering Championships 2021 (PreO) Cum World Ranking Event | Metropolitan Orienteering Club
Orienteering Association of Hong Kong | Hong Kong | T | loc | | P | | |
| 19 Dec | 2021 香港周年沿徑定向錦標賽 (速決賽) 暨世界排位賽 Hong Kong Annual Trail Orienteering Championships 2021 (TempO) Cum World Ranking Event | Orienteering Association of Hong Kong
 Startrail Orienteering Club | Hong Kong | T | loc | | T | | |
| 19 Dec - 26 Dec | Hong Kong O Week 2021 (Individual) | A123
Akinalliance
Apex Action
 Hong Kong Island Orienteering Force
Metropolitan Orienteering Club
MOPC
Orienteering Association of Hong Kong
 Queen's College Orienteering Club | Hong Kong | | nat | | S | | |
| 22 Dec - 28 Dec | 2021年 香港野外定向會 x 台灣定向運動協會 網上沿徑定向（精確賽）系列 第六回 HKOC x TWOA Online TrailO (PreO) Series 2021 Series 6 | Hong Kong Orienteering Club | Hong Kong | T | loc | | P | 22/12* | |
| 24 Dec - 27 Dec | 4th Asian Junior and Youth Orienteering Championships | Hong Kong | Hong Kong | | int | | M | | |
| 27 Dec | Hong Kong O Week 2021 (Sprint Relay) | A123
Akinalliance
Apex Action
Hong Kong Island Orienteering Force
Metropolitan Orienteering Club
MOPC
Orienteering Association of Hong Kong
Queen's College Orienteering Club | Hong Kong | | nat | R | S | | |
