Atomu (written: 亜土夢, 亜人夢, 亜斗夢, 亜飛夢 or アトム in katakana) is a masculine Japanese given name. Notable people with the name include:

• Atomu Mizuishi (水石 亜飛夢, born 1996), Japanese actor
• Atomu Nabeta (鍋田 亜人夢, born 1991), Japanese footballer
• Atomu Shimojō (下條 アトム, born 1946), Japanese actor and voice actor
• Atomu Shigenaga (重永 亜斗夢, born 1988), Japanese golfer
• Atomu Tanaka (田中 亜土夢, born 1987), Japanese footballer