| Keisuke Hayasaka | |
| Position: | Infielder |
| Birth Date: | 19 June 1984 |
| Bats: | Both |
| Throws: | Right |
| Debutleague: | NPB |
| Debutyear: | 2003 |
| Debutteam: | Chiba Lotte Marines |
| Statyear: | 2014 |
| Statleague: | NPB |
| Stat1label: | Batting average |
| Stat1value: | .196 |
| Stat2label: | Home runs |
| Stat2value: | 3 |
| Stat3label: | RBI |
| Stat3value: | 26 |
| Teams: |
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Keisuke Hayasaka (早坂 圭介, born June 19, 1984) is a Japanese former professional baseball infielder. He played with the Chiba Lotte Marines in Nippon Professional Baseball in 2003 and from 2006 to 2014.