Hengchun Old City Wall (traditional Chinese: 恆春縣城; simplified Chinese: 恒春县城; pinyin: Héngchūn Xiànchéng) refers to the historic castle town of Hengchun, Pingtung, Taiwan.

[1] During the Qing dynasty, the area that is modern-day Hengchun was governed as part of Fengshan County.

However, being a distant and sparsely populated region, the Qing found it hard to govern the area.

Shen Baozhen, originally dispatched to Hengchun after the Mudan incident, suggested that a fort be built in the area and named it "Hengchun", meaning "constantly spring", referring to the region's fair weather.

Within the walls, civilians typically resided near the south and west gates, while a military barrack occupied the northern half of the town.