Dadong may refer to:
China District Dadong District (), Shenyang, Liaoning
Subdistricts () Dadong Subdistrict, Guangzhou, in Yuexiu District, Guangzhou, Guangdong Dadong Subdistrict, Jilin City, in Chuanying District, Jilin City, Jilin Dadong Subdistrict, Donggang, Liaoning
Towns Written as "": Dadong, Dabu County, Guangdong Dadong, Jiangsu, in Lianshui County
Written as "": Dadong, Bobai County, Guangxi Dadong, Qinzhou, in Qinbei District, Qinzhou, Guangxi
Townships Dadong Township (), in Gucheng District, Lijiang, Yunnan
Other Da Dong Roast Duck Restaurant (often rendered as "DaDong"), main restaurant located in Dongcheng District, Beijing
South Korea Da-dong ( / ), neighbourhood of the Jung-gu District in Seoul
Taiwan Dadong metro station