Daigo is both a masculine Japanese given name and a surname. Notable people with the name include:

Surname

• Daigo Fuyumoto (1648–1697), Japanese court noble who founded the family branch
• Naoyuki Daigo (born 1981), Japanese high jumper
• Tadashige Daigo (1891–1947), Imperial Japanese Navy admiral during World War II
• Takeo Daigo (醍醐 猛夫, 1938–2019), Japanese baseball player
• Toshirō Daigo (born 1926), Japanese 10th dan judoka

Given name

• Daigo Araki (荒木 大吾, born 1994), Japanese footballer
• Daigo Furukawa (古川 大悟, born 1999), Japanese footballer
• Daigo Hara (原 大虎, born 1974), Japanese freestyle skier
• Daigo Hasegawa (長谷川 大悟, born 1990), Japanese athlete
• Daigo Higa (比嘉 大吾, born 1995), Japanese boxer
• Daigo Hisateru (1937–1983), Japanese sumo wrestler
• Daigō Kenshi (born 1952), Japanese sumo wrestler
• Daigo Kobayashi (小林 大悟, born 1983), footballer
• Daigo Matsui (松居 大悟, born 1985), Japanese screenwriter and film director
• Daigo Matsuura (松浦 大悟, born 1969), Japanese politician
• Daigo Naitō (内藤 大湖, born 1978), Japanese musician, main vocalist of Breakerz
• Daigo Nishi (西 大伍, born 1987), Japanese footballer
• Daigo Saito (斎藤 太吾, born 1980), Japanese professional drifting driver
• Daigo Takahashi (髙橋 大悟, born 1999), Japanese footballer
• Daigo Umehara (梅原 大吾, born 1981), Japanese professional video gamer
• Daigo Watanabe (渡邉 大剛, born 1984), Japanese footballer