Miyashita (written: 宮下) is a Japanese surname. Notable people with the surname include:
Haruka Miyashita (宮下 遥, born 1994), Japanese volleyball playerHidehiro Miyashita (宮下 秀洋, 1913–1976), Japanese Go playerIchiro Miyashita (宮下 一郎, born 1958), Japanese politicianJunichi Miyashita (宮下 純一, born 1983), Japanese swimmerJunko Miyashita (宮下 順子, born 1949), Japanese actressKazuhiro Miyashita (宮下 和広, born 1961), Japanese handball playerMasahiro Miyashita (born 1975), Japanese footballerTomomi Miyashita (宮下 ともみ, born 1982), Japanese actressYuya Miyashita (宮下 雄也, born 1985), Japanese singer and actor