Ōhata, Ohata or Oohata (written: or ) is a Japanese surname. Notable people with the surname include:
Ayumu Ōhata (born 2001), Japanese footballer , Japanese politician Allan M. Ohata (1918–1977), United States Army soldier and Medal of Honor recipient , Japanese rugby union player , Japanese anime mecha designer, storyboard artist and director Mariana Ohata (born 1978), Brazilian triathlete , Japanese sport shooter , Japanese professional wrestler , Japanese handball player