Chianan

Chianan, Chia-nan, or Jianan may refer to:


 * Chiayi–Tainan Plain, also known as the Chianan or Jianan Plain (嘉南平原, Jiānán Píngyuán), a large plain on Taiwan Island
 * Chianan Irrigation (嘉南大圳, Jianán Dàzùn), also known as the Kanan Irrigation, used by farms in the Taiwanese plain