Dongshi District (; Pha̍k-fa-sṳ: Tûng-sṳ) is a suburban district in eastern Taichung, Republic of China (Taiwan). It is the third largest district in Taichung City after Heping District and Taiping District. A majority of the residents are of Hakka ethnicity, making it an enclave in an otherwise non-Hakka county. Its Hakka dialect is very distinct compared to the dialects of other counties.