Masaki may refer to:
- Masaki, Ehime in Japan
- Masaki, Tanzania
- Masaki, common male Japanese given name
- Masaki Aiba(相葉雅紀), actor and musician
- Masaki Aizawa(相沢正輝), voice actor
- Masaki Etō(江藤正樹), wrestler, Olympic silver medalis
- Masaki Fukai(深井正樹), football player
- Masaki Inoue(井上昌己), cyclist
- Masaki Kaji(加治将樹), actor and singer
- Masaki Kajishima(梶島正樹), anime artist
- Masaki Kanda(神田正輝), actor
- Masaki Kashiwara(柏原正樹), mathematician
- Masaki Kawanabe(川鍋雅樹), Japanese voice actor and actor
- Masaki Kitahara(北原雅樹), actor
- Masaki Kobayashi(小林正樹), film director
- Masaki Kyomoto(京本政樹), singer-songwriter and actor
- Masaki Maki(真木将樹), baseball player
- Masaki Matubara(松原正樹), musician
- Masaki Morimoto(森本雅樹), astronomer
- Masaki Morinaga(森長正樹), athlet
- Masaki Nomura(相葉雅紀), actor and musician
- Masaki Okimoto(沖本摩幸), professional wrestler
- Masaki Saito(斎藤雅樹), baseball player
- Masaki Takemiya(武宮正樹), Go player
- Masaki Tani(谷将貴), golfer
- Masaki Terasoma(てらそままさき), voice actor
- Masaki Tsuji(辻真先), scenario writer and
- Masaki Fukai (深井正樹), football player
- Masaki Ueda (上田正樹), singer-songwriter
- Masaki Yamada (山田正紀), science fiction author
- Masaki, Japanese surname