| Aiko Onozawa | |
| Birth Date: | 19 August 1945 |
| Birth Place: | Midori-ku, Sagamihara, Kanagawa, Japan |
| Headercolor: | lightsteelblue |
| Show-Medals: | yes |
is a Japanese former volleyball player who competed in the 1968 Summer Olympics.
In 1968 she was a squad member of the Japanese team which won the silver medal in the Olympic tournament.