| Mariko Okamoto | |
| Fullname: | Mariko Okamoto (-Nakano) |
| Height: | 1.73 m |
| Teamnumber: | 9 (1972) 2 (1976) |
| Nationalyears: | 1972-1976 |
(born 28 December 1951) is a Japanese volleyball player and Olympic champion.
Okamoto was a member of the Japanese winning team at the 1976 Olympic games.[1]