Onaga may refer to:Onaga, a Mortal Kombat character Onaga, Kansas, a city in the United States Onaga, one of the Japanese names, used in Hawaii, for the fish Etelis coruscans also known as ʻulaʻula koaʻe or longtail red snapper Callistus Valentine Onaga, Roman Catholic bishop Takeshi Onaga (1950–2018), Governor of Okinawa, Japan Hijiri Onaga, Japanese football player Miki Onaga, Japanese racing driver Onaga Shale, a fossil-bearing geologic formation in Onaga, Nebraska