Dadao, formerly romanized ta-tao, may refer to:
Dadao (sword) (, p dàdāo, ), a machete-like variety of the Chinese sword dao "The Sword March", a Chinese song during the Second Sino-Japanese War (World War II) that begins Dadao! Tao, the "Great Way" (, p Dàdào) of Chinese philosophies and religions The Great Way Government of Shanghai (1937–38) during the early stages of the Second Sino-Japanese War (World War II)
See also Dadaocheng (disambiguation)