2020 Zomer Olympische Spelen - Atleten
| Atleet | Sport |
|---|---|
 Alicia Mateus | Aquatics |
 Vincent Matheron | Skateboarden |
 Alannah Mathews | Gymnastiek |
 Sibusiso Matsenjwa | Athletiek |
 Rie Matsubara | Gymnastiek |
| Hiroki Matsueda | Athletiek |
| Takayuki Matsumoto | Schieten |
| Katsuhiro Matsumoto | Aquatics |
| Momotaro Matsushita | Canoe/Kayak |
| Hideki Matsuyama | Golf |
 Pier Andrea Matteazzi | Aquatics |
 Bethanie Mattek-Sands | Tennis |
 Matti Mattsson | Aquatics |
| Rie Matusbara | Gymnastiek |
 Edis Matusevicius | Athletiek |
 Nicholas Matveev | Canoe/Kayak |
 Barbara Matz | Zeilen |
 Lucas Matzerath | Aquatics |
| Alessia Maurelli | Gymnastiek |
| Harrison Maurus | Gewichtheffen |
 Nikolaos Mavrommatis | Schieten |
| Bassa Mawem | Klimsport |
| Mickael Mawem | Klimsport |
| Victoria Max-Theurer | Ruiter |
| Kevin Mayer | Athletiek |