Olimpiadas de Verano 2020 - Deportistas
| Deportista | Deporte |
|---|---|
 Alicia Mateus | Aquatics |
 Vincent Matheron | Patineta |
 Alannah Mathews | Gimnasia |
 Sibusiso Matsenjwa | Atletismo |
 Rie Matsubara | Gimnasia |
| Hiroki Matsueda | Atletismo |
| Takayuki Matsumoto | Tiro |
| Katsuhiro Matsumoto | Aquatics |
| Momotaro Matsushita | Canoe/Kayak |
| Hideki Matsuyama | Golf |
 Pier Andrea Matteazzi | Aquatics |
 Bethanie Mattek-Sands | Tenis |
 Matti Mattsson | Aquatics |
| Rie Matusbara | Gimnasia |
 Edis Matusevicius | Atletismo |
 Nicholas Matveev | Canoe/Kayak |
 Barbara Matz | Vela |
 Lucas Matzerath | Aquatics |
| Alessia Maurelli | Gimnasia |
| Harrison Maurus | Levantamiento de Pesas |
 Nikolaos Mavrommatis | Tiro |
| Bassa Mawem | Escalada Deportiva |
| Mickael Mawem | Escalada Deportiva |
| Victoria Max-Theurer | Ecuestre |
| Kevin Mayer | Atletismo |