Keiichi is a masculine Japanese given name and may refer to:
- Keiichi Ishizaka, music director
- Keiichi Kawanaka, butterfly swimmer
- Keiichi Nanba, voice actor
- Keiichi Noda, voice actor
- Keiichi Nozaki, music producer
- Keiichi Sigsawa, light novel author
- Keiichi Sonobe, voice actor
- Keiichi Suzuki (composer), music composer
- Keiichi Suzuki (speed skater), speed skater
- Keiichi Tsuchiya, racecar driver (sometimes nicknamed as Drift King)
Read more about Keiichi: Fictional Characters