Otaka, Ōtaka or Ootaka (written: 大高, 大鷹 or おおたか in hiragana) is a Japanese surname. Notable people with the surname include:
- Akira Otaka (大鷹 明良; born 1957), Japanese actor
- Rikiya Otaka (大高 力也; born 1991), Japanese actor
- Yoshiko Ōtaka (大鷹 淑子; 1920–2014), Japanese actress, singer and politician
- Yukiko Otaka (大高 幸子; born 1940), Japanese swimmer
Otaka (written: 尾高 or おたか in hiragana) is a separate Japanese surname. Notable people with the surname include:
- Atsutada Otaka (尾高 惇忠; 1944–2021), Japanese composer and musicologist
- Hisatada Otaka (尾高 尚忠; 1911–1951), Japanese composer and conductor
- Tadaaki Otaka (尾高 忠明; born 1947), Japanese music conductor