Onodera (written: 小野寺 or オノデラ in katakana) is a Japanese surname. Notable people with the surname include:
Chikara Onodera (小野寺 力, born 1980), Japanese baseball player
Itsunori Onodera (小野寺 五典, born 1960), Japanese politician
Kaho Onodera (小野寺 佳步, born 1991), Japanese curler
Lisa Onodera, American film producer
Masaya Onodera, Japanese mixed martial artist
Midi Onodera, Japanese-Canadian filmmaker
Tatsuya Onodera (小野寺 達也, born 1987), Japanese footballer
Onodera Yoshimichi (小野寺 義道, 1566–1645), Japanese daimyō
Yuki Onodera (オノデラ ユキ, born 1962), Japanese photographer