大海

大海, meaning "big sea" or "ocean", may refer to:
 * Ōmi Station (Aichi), Iida Line station in Shinshiro, Aichi Prefecture, Japan
 * Taikai, style of karamono chaire
 * Album by Taiwan pop singer Chang Yu-sheng

People with the given name 大海 include:
 * Hu Dahai, Ming Dynasty general of China
 * Kwok Dai-hoi, character in Hidden Treasures (TV series)
 * Tong Dai-hoi, character in The Brink of Law