Gangshan District (Chinese: 岡山區; Hanyu Pinyin: Gāngshān Qū; Tongyong Pinyin: Gangshan Cyu; Wade–Giles: Kang1-shan1 Ch'ü1; Pe̍h-ōe-jī: Kong-san-khu, Hakka: Kông-sân-khî), is a suburban district in Kaohsiung City in southern Taiwan.

In 1920, during the Japanese era, the town of A-kong-tien (阿公店; Pe̍h-ōe-jī: A-kong-tiàm) was renamed Okayama (岡山) and made the site of an airbase.

Following the Surrender of Japan and handover to the Kuomintang, the government continued to use the same name (岡山), but transliterated using Mandarin (Gangshan).

The district consists of Pingan, Gangshan, Shoutian, Weiren, Houhong, Daliao, Zhongxiao, Heping, Qianfeng, Liucuo, Xiehe, Houxie, Xinyi, Tande, Sanhe, Renshou, Bihong, Chengxiang, Zhuwei, Taishang, Wanli, Baimi, Shitan, Fuxing, Benzhou, Jiaxing, Jiafeng, Huagang, Dazhuang, Xierong, Weisui, Shoufeng and Renyi Village.

Due to this the area developed into a center of the regional trade, slaughter, and consumption of goats.