Morioka (written: 森岡 or 守岡) is a Japanese surname. Notable people with the surname include:
Eiji Morioka (森岡 栄治; 1946–2004), Japanese boxer
Hatsuko Morioka (守岡 初子; born 1915), Japanese swimmer
Hiroshi Morioka (守岡 博), Japanese anime director and artist
Hiroyuki Morioka (森岡 浩之; born 1962), Japanese writer
Kaoru Morioka (森岡 薫; born 1979), Peruvian-born Japanese futsal player
Ken Morioka (森岡 賢; 1967–2016), Japanese musician
Kōichirō Morioka (森岡 紘一朗; born 1985), Japanese racewalker
Masahiro Morioka (森岡 正博; born 1958), Japanese philosopher
Masahiro Morioka (politician) (森岡 正宏), Japanese politician
Ted Morioka, American politician
Ryuzo Morioka (森岡 隆三; born 1975), Japanese footballer
Ryosuke Morioka (森岡 良介; born 1984), Japanese baseball player
Ryota Morioka (森岡 亮太; born 1991), Japanese footballer
Shigeru Morioka (森岡 茂; born 1973), Japanese footballer
Zak Morioka (born 1978), Brazilian racing driver