Hayasaka (written: 早坂) is a Japanese surname. Notable people with the surname include:
Fumio Hayasaka (早坂 文雄) (1914–1955), Japanese composer
Hitomi Hayasaka (早坂 ひとみ) (born 1982), Japanese actress, model and AV idol
Keisuke Hayasaka (早坂 圭介) (born 1984), Japanese baseball player
Miki Hayasaka (早坂 未紀) (born 1955), Japanese illustrator and manga artist
Ryota Hayasaka (早坂 良太) (born 1985), Japanese footballer
Yoshie Hayasaka (早坂 好恵) (born 1975), Japanese actress and singer