| Junichi Seki | |
| Birth Date: | 1935 8, df=y |
| Birth Place: | Osaka, Japan |
| Nationality: | Japanese |
| Occupation: | Doctor |
| Education: | Osaka City University |
| Party: | Independent |
| Office: | Mayor of Osaka |
| Term Start: | 19 December 2003 |
| Term End: | 18 December 2007 |
| Predecessor: | Takafumi Isomura |
| Successor: | Kunio Hiramatsu |
| Native Name Lang: | ja |
Junichi Seki (ja|關淳一 Seki Jun'ichi; 13 August 1935 – 9 June 2024) was a Japanese politician. An independent, he served as mayor of Osaka from 2003 to 2007.[1]
Seki died on 9 June 2024, at the age of 88.[2]