Xuanwu (玄武, pinyin: xuan2 wu3) may refer to:
- Xuan Wu, the Black Tortoise, one of the Four Symbols of the Chinese constellations.
- Xuanwu District, Nanjing, China
- Xuanwu Lake, in Nanjing, China
- Xuan Wu (god), a saint of Wudang
- Xuanwu, Luyi County, town in Luyi County, Henan, China
Xuanwu (宣武, pinyin: xuan1 wu3) refers to:
- Xuanwu District, Beijing, China
- Emperor Xuanwu of Northern Wei