Yamagata (written: 山形, 山像, 山片 or 山縣) is a Japanese surname. Notable people with the surname include:
Yamagata Aritomo (1838–1922), Japanese military leader and politician Yamagata Bantō (1748–1821), Japanese scholar and merchant Hiro Yamagata (artist) (born 1948), Japanese artist based in Los Angeles, California Hiro Yamagata (born 1964), Japanese author, critic, economist, and translator Isao Yamagata (1915–1996), Japanese film actor Kakuko Yamagata (born 1969), Japanese singer Kaori Yamagata (born 1963), Japanese voice actress Kyohei Yamagata (born 1981), Japanese football player Yamagata Masakage (1524–1575), Japanese samurai Rachael Yamagata (born 1977), American singer-songwriter Ryota Yamagata (born 1992), Japanese sprinter Tatsunori Yamagata (born 1983), Japanese football player Yukio Yamagata (born 1957), Japanese singer, actor, and voice actor Yusuke Yamagata (born 1986), Japanese footballer