Ōnuki

• Ami Onuki, Japanese pop singer
• Minako Onuki, Japanese volleyball player
• Shinji Onuki, Japanese rugby union player
• Taeko Onuki, Japanese singer and songwriter
• Yasuko Onuki, Japanese singer

  Fictional characters

• Ami Onuki, a character in the Japanese-American animated television series Hi Hi Puffy AmiYumi, based on the Japanese pop singer by the same name
• Keiko Onuki, a character in the Battle Royale manga series