Neimen is located in the mountainous area with very little flat land.

Qishan River passes through the Neimen district.

After the handover of Taiwan from Japan to the Republic of China in 1945, Neimen was organized as a rural township of Kaohsiung County.

The district consists of Gouping, Jinzhu, Yongfu, Yongji, Yongxing, Shikeng, Neimen, Neili, Guanting, Zhongpu, Neitung, Neinan, Tungpu, Sanping, Muzha, Neixing, Ruishan and Guangxing Village.

However, the district is also famous for its roadside banquet culture.