| 3 Jan | 色級定向活動 2020/2021 Colour-Coded Event 2020/2021 |  Orienteering Association of Hong Kong, China | Hong Kong | | loc | | 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, China | Hong Kong | | loc | | M | | |
| 24 Jan | NPV x Kakato Men Dog Orienteering Race 2021 |  Hong Kong Orienteering Club | Hong Kong | | loc | T | 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, China | 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 | | |
| 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, China | Hong Kong | | loc | | M | |  |
| 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 | | |
| 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 | | |
| 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, China | 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 | | |
| 7 Aug | Str8 x TerraX Sprint Orienteering Tournament 2021 Round 2 | TerraX Sports Club
Y2Y Orienteering Development and Training Centre | Hong Kong | | loc | | S | | |
| 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 | | |
| 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 | | |
| 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 | | |
| 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 | | |
| 28 Aug | HKOC Advance Orienteering Technical Training 2021 Session 1 | Hong Kong Orienteering Club | Hong Kong | | loc | | M | | |
| 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 | 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 | | |
| 5 Sep | HKOC Advance Orienteering Technical Training 2021 Session 2 | Hong Kong Orienteering Club | Hong Kong | | loc | | M | | |
| 11 Sep | WOD Pro-Active Training Challenge 2021 (Hung Hom East) | Pro-Active Orienteering Club | Hong Kong | | loc | | S | | |
| 18 Sep | Mazerun Battle 2021 by TerraX ｜TerraX 呈獻：迷宮對決 2021 | TerraX Sports Club
Y2Y Orienteering Development and Training Centre | Hong Kong | | loc | | S | | |
| 18 Sep | Str8 x TerraX Sprint Orienteering Tournament 2021 Round 3 | TerraX Sports Club
Y2Y Orienteering Development and Training Centre | Hong Kong | | loc | | S | | |
| 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 | | |
| 1 Oct | 世界迷宮定向賽暨本地挑戰 World Maze Race 2021 cum Local Challenge |  Apex Action | 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 | | |
| 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 | | |
| 10 Oct | 香港定向排名聯賽 – 中/長距離 (掌牛山) Hong Kong Orienteering Ranking League - Middle/Long (Cheung Ngau Shan) | Orienteering Association of Hong Kong, China
 St. Francis Xavier College Orienteering Club | Hong Kong | | loc | | 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 | | |
| 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 | | |
| 24 Oct | 2021年香港沿徑定向入圍賽 (精確賽) - 保良局北潭涌渡假營 Hong Kong Trail Orienteering Qualification 2021 (PreO) - Po Leung Kuk Pak Tam Chung Holiday Camp | Orienteering Association of Hong Kong, China
 Orienteering Seeds HK | Hong Kong | T | loc | | P | | |
| 30 Oct - 1 Nov | 香港海運週定向賽2021 Hong Kong Maritime Week Orienteering Race 2021 | Hong Kong Orienteering Club | Hong Kong | | loc | | L | | |
| 31 Oct | 香港定向排名聯賽 – 短距離(香港基督教青年會南丫島戶外及環保活動中心) Hong Kong Orienteering Ranking League - Sprint (YMCA Lamma Island Outdoor Centre) | Orienteering Association of Hong Kong, China
 Wah Yan Orienteering Club | Hong Kong | | loc | | S | | |
| 6 Nov | Str8 x TerraX Sprint Orienteering Tournament 2021 Round 5 | TerraX Sports Club
Y2Y Orienteering Development and Training Centre | Hong Kong | | loc | | S | | |
| 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 | | |
| 14 Nov | 香港定向排名聯賽 – 中/長距離 (排頭坑) Hong Kong Orienteering Ranking League - Middle/Long (Pai Tau Hang) |  A123
Orienteering Association of Hong Kong, China | Hong Kong | | loc | | M | | |
| 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 | | |
| 21 Nov | 2021年香港沿徑定向入圍賽 (速決賽) - 聯青社-青年會黃宜洲青年營 Hong Kong Trail Orienteering Qualification 2021 (TempO) - Y's Men - YMCA Wong Yi Chau Youth Camp | MOPC
Orienteering Association of Hong Kong, China | Hong Kong | T | loc | | T | | |
| 27 Nov | 香港定向排名聯賽 – 短距離(保良局賽馬會大棠渡假村) Hong Kong Orienteering Ranking League - Sprint (PLK Jockey Club Tai Tong Holiday Camp) | Orienteering Association of Hong Kong, China | 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 - 5 Dec | 公園定向同樂日(香港動植物公園) Park Orienteering Fun Day (Hong Kong Zoological and Botanical Gardens) |  Leisure and Cultural Services Department
Orienteering Association of Hong Kong, China | Hong Kong | | loc | | S | | |
| 4 Dec | Str8 x TerraX Sprint Orienteering Tournament 2021 Round 6 | TerraX Sports Club
Y2Y Orienteering Development and Training Centre | Hong Kong | | loc | | S | | |
| 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 | 香港定向排名聯賽 – 中/長距離(鴨仔山) Hong Kong Orienteering Ranking League - Middle/Long(Duckling Hill) | Orienteering Association of Hong Kong, China | Hong Kong | | loc | | M | | |
| 18 Dec | 2021香港周年沿徑定向錦標賽(精確賽)暨世界排位賽 (長洲西園) Hong Kong Annual Trail Orienteering Championships 2021 (PreO) Cum World Ranking Event (Saiyuen Cheung Chau) | MOPC
Orienteering Association of Hong Kong, China | 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 (保良局賽馬會大棠渡假村) Hong Kong Annual Trail Orienteering Championships 2021 (TempO) Cum World Ranking Event (PLK JC Tai Tong Holiday Camp) | Orienteering Association of Hong Kong, China
 Startrail Orienteering Club | Hong Kong | T | loc | | T | | |
| 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 | | |
| 25 Dec - 27 Dec | X'Mas Orienteering Challenge Series 2021 | Y2Y Orienteering Development and Training Centre | Hong Kong | | loc | | S | | |
| 26 Dec | 香港定向排名聯賽 – 中/長距離 (下花山) Hong Kong Orienteering Ranking League - Middle/Long (Ha Fa Shan) | Orienteering Association of Hong Kong, China | Hong Kong | | loc | | M | | |
| 27 Dec | 香港定向排名聯賽 – 短距離(馬灣) Hong Kong Orienteering Ranking League - Sprint (Ma Wan) |  Metropolitan Orienteering Club
Orienteering Association of Hong Kong, China | Hong Kong | | loc | | S | | |
| 31 Dec | AASR-00 | Apex Action | Hong Kong | | loc | | S | | |
