Dadu District (Chinese: 大肚區; pinyin: Dàdù Qū; Pe̍h-ōe-jī: Tōa-tō͘-khu) is a suburban district in southwestern Taichung, Taiwan.

The eponymous Dadu River flows nearby.

Dadu was the historical capital of the Kingdom of Middag which was established by the Taiwanese indigenous tribes of Papora, Babuza, Pazeh, and Hoanya.

Huangxi Academy was built in 1887 and was the predecessor of Dadu Elementary School.

Dadu District consists of 17 villages.