Iida (written: 飯田) is a Japanese surname. Notable people with the surname include:

• Akira Iida (飯田 章, born 1969), Japanese racing driver
• Chōko Iida (飯田 蝶子, 1897–1972), Japanese film actress
• George Iida (飯田 譲治, born 1959), Japanese film and television director, screenwriter, manga author, and novelist
• Kaori Iida (飯田 圭織, born 1981), Japanese singer and artist
• Kodai Iida (飯田 昴大, born 1994), Japanese footballer
• Koichi Iida ((飯田 鴻一, 1888–1973), Japanese businessman
• Jumpei Iida (飯田 淳平, born 1981), Japanese football referee
• Masaki Iida (飯田 真輝, born 1985), Japanese footballer
• Raura Iida (飯田 來麗, born 1998), Japanese singer and actress
• Riho Iida (飯田 里穂, born 1991), Japanese voice actress and singer
• Shōjirō Iida (飯田 祥二郎, 1888–1980), general in the Imperial Japanese Army in World War II
• Tatsumi Iida (飯田 健巳, born 1985), Japanese footballer
• Tetsu Iida (飯田 鉄, born 1948), Japanese photographer
• Tetsunari Iida (飯田 哲也, born 1959), director of the Institute for Sustainable Energy Policies in Japan
• Tetsuya Iida (飯田 哲也, born 1968), former Nippon Professional Baseball outfielder
• Tokuji Iida (飯田 徳治, 1924-2000), former Nippon Professional Baseball first baseman and manager; inducted into the Japanese Baseball Hall of Fame
• Iida Umanosuke (飯田 馬之介, born 1961), director of the anime series Hellsing

Fictional characters

• Tenya Iida (飯田 天哉), a character in the manga and anime series My Hero Academia
• Tensei Iida (飯田 天睛), a character in the manga and anime series My Hero Academia