Cihou Fort or Cihou Battery (Chinese: 旗後砲臺; Hanyu Pinyin: Qíhòu Pàotái; Tongyong Pinyin: Cíhòu Pàotái; Pe̍h-ōe-jī: Kî-āu Phàu-tâi) is a historic fort in Cijin District, Kaohsiung, Taiwan, formerly guarding the northern entrance to Kaohsiung Harbor.

[1] After the Japanese expedition in 1874, the Qing authorities constructed a modern fort, which in 1880 had new Armstrong's guns installed.

[2] It played no part in the Sino-French War; the fighting in Taiwan took place around Keelung and during blockade French ships did not approach the port.

On 12 October 1895, an escadre commanded by admiral Arichi Shinanojo (cruisers Yoshino, Naniwa, Akitsushima, Yaeyama, Saien (ex Chinese Jiyuan, captured in Weihaiwei) and corvette Hiei) arrived at Takow (modern-day Kaohsiung) and prompted the foreigners to evacuate, as they would conduct the attack on the next day.

Planned by British engineer, H. W. Harwood,[1] the fort consists of three parts: Of the 19th-century fortification at the foot of the hill, only remainders are still visible.