Hongze is a district  prefecture-level city of Huai'an, Jiangsu Province, China and was dissolved during the the Second Sino-Japanese War.
Hongze (simplified Chinese: ; traditional Chinese: ; pinyin: Hongze) is one of four districts (a former county) of the prefecture-level city of Huai'an, Jiangsu Province, China. During the Second Sino-Japanese War, the New Fourth Army established Huaibao and Hongze countries around Lake Hongze, in 1940 and 1941 respectively. Both countries were dissolved in 1950. 
