Niwa (surname)

Niwa is a Japanese surname. Notable people with the surname include:


 * Niwa clan, retainer clan of the Oda clan during the Sengoku period of Japan (1603 – 1868)
 * Niwa Nagaaki, Daimyō of Nihonmatsu, 1796 – 1813
 * Niwa Nagahide, Daimyō of Shirakawa
 * Niwa Nagahiro, Daimyō of Nihonmatsu, 1868 – 1871
 * Niwa Nagakuni, Daimyō of Nihonmatsu, 1858 – 1868
 * Niwa Nagashige, Daimyō of Shirakawa, 1628 – 1638
 * Niwa Nagatomi, Daimyō of Nihonmatsu, 1813 – 1858
 * Akemi Niwa (丹羽 明美), Japanese curler, 1998 Winter Olympics participant
 * Daiki Niwa (footballer), Japanese footballer
 * Hideki Niwa, Japanese politician
 * Koki Niwa, Japanese table tennis player
 * Mikiho Niwa, Japanese actress
 * Niwa Mitsushige (丹羽 光重), Japanese samurai and daimyō
 * Ryuhei Niwa, Japanese footballer
 * Shion Niwa (丹羽 詩温), Japanese footballer
 * Uichiro Niwa, Japanese diplomat and businessman
 * Yasujiro Niwa, Japanese scientist
 * Yuya Niwa, Japanese politician