Hongze (simplified Chinese: 洪泽; traditional Chinese: 洪澤; pinyin: Hóngzé) is one of four districts (a former county) of the prefecture-level city of Huai'an, Jiangsu Province, China.

Occupying the southeastern shores of Lake Hongze, it borders the prefecture-level cities of Suqian to the northwest and Yangzhou (briefly) to the east.

During the Second Sino-Japanese War, the New Fourth Army established Huaibao and Hongze counties around Lake Hongze, in 1940 and 1941 respectively.

The new Hongze county, within a wider area around the lake, was founded to implement the guiding principle of "reshuffling administrative divisions by the lake" in 1956.

[2] At present, Hongze District has 11 towns.