| Masuo Matsuoka | |
| Birth Date: | 1934 10, df=y |
| Birth Place: | Xinjing, Manchukuo |
| Death Place: | Hikari, Yamaguchi Prefecture, Japan |
| Nationality: | Japanese |
| Occupation: | Steelworker |
| Education: | Waseda University |
| Party: | LDP JNP NFP DPJ |
| Office: | Member of the House of Representatives of Japan |
| Term Start: | 19 July 1993 |
| Term End: | 20 October 1996 |
| Office2: | Member of the House of Councillors for the Yamaguchi at-large district |
| Term Start2: | 12 July 1998 |
| Term End2: | 11 July 2004 |
| Term Start3: | 26 June 1983 |
| Term End3: | 23 July 1989 |
| Native Name Lang: | ja |
Masuo Matsuoka (Japanese: 松岡満寿男 Matsuoka Masua; 4 October 1934 – 9 June 2024) was a Japanese politician. A member of multiple political parties, he served in the House of Councillors from 1983 to 1989 and again from 1998 to 2004. He also served in the House of Representatives from 1993 to 1996.[1]
Matsuoka died in Hikari, Yamaguchi Prefecture on 9 June 2024, at the age of 89.[2]