Omura (小村) or Ōmura (大村) are Japanese surnames, but may also refer to:
Ōmura, Nagasaki, a city located in Nagasaki Prefecture, Japan Ōmura clan, a clan of samurai of Medieval Japan of the province of Hizen Omura's whale (Balaenoptera omurai), a species of rorqual about which very little is known Dacun, renamed Ōmura during Japanese rule, a rural township in Changhua County, Taiwan
People Ōmura Masujirō (大村 益次郎, 1824–1869), a Japanese military leader and theorist in Bakumatsu period Japan Ōmura Sumihiro (大村 純熈, 1830–1882), the 13th and final daimyō of Ōmura Domain in Hizen Province, Kyūshū, Japan Ōmura Sumitada (大村 純忠, 1533–1587), a Japanese daimyō lord of the Sengoku period Ōmura Yoshiaki, a ruling head of the clan of Omura throughout the latter Sengoku Period of Feudal Japan Hideaki Ōmura (大村 秀章, born 1960), a Japanese politician and the governor of Aichi Prefecture Jim K. Omura (born 1940), an electrical engineer and information theorist , Japanese footballer Norio Omura (小村 徳男, born 1969), a former Japanese football defender Satoshi Omura (大村 智, born 1935), a Japanese microbiologist Seiichi Ōmura (大村 清一, 1892–1968), politician and cabinet minister