Miyashiro (written: 都城, 宮代, 宮城) is a Japanese surname. 宮代 also be pronounced Miyadai. 宮城 also be pronounced Miyagi. In Okinawan language, 宮城 may be pronounced Naagusuku or Naagushiku. Notable people with the surname include:
, Japanese geologist Aldo Miyashiro (born 1976), Peruvian playwright, screenwriter and actor Augusto Miyashiro (born 1949), Peruvian engineer and politician Paulo Miyashiro, Brazilian triathlete Ron Miyashiro, American artist Tamari Miyashiro (born 1987), American volleyball player